\u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01a1i m\u1edbi ch\u00e2n \u01b0\u1edbt ch\u00e2n r\u00e1o \u0111\u1ebfn v\u1edbi th\u1ebf gi\u1edbi l\u00f4 \u0111\u1ec1 th\u00ec kh\u00e1i ni\u1ec7m \u201c\u0111\u1ec1 ch\u1ea1m\u201d c\u00f2n qu\u00e1 m\u01a1 h\u1ed3. Nh\u1eefng c\u00e2u h\u1ecfi tr\u1ecdng t\u00e2m xoay quanh \u0111\u1ec1 ch\u1ea1m nh\u01b0 \u0111\u1ec1 ch\u1ea1m l\u00e0 g\u00ec? C\u00f3 bao nhi\u00eau c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m v\u00e0 c\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m c\u1ee5 th\u1ec3 l\u00e0 g\u00ec? Trong b\u00e0i vi\u1ebft sau, s\u1ebd t\u1ed5ng h\u1ee3p kh\u00e1i qu\u00e1t c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn \u0111\u1ec1 ch\u1ea1m c\u0169ng nh\u01b0 m\u1ed9t s\u1ed1 kinh nghi\u1ec7m b\u1eaft \u0111\u1ec1 ch\u1ea1m chu\u1ea9n x\u00e1c nh\u1ea5t, gi\u00fap ng\u01b0\u1eddi m\u1edbi ch\u01a1i b\u1edbt l\u00fang t\u00fang h\u01a1n, t\u1ef1 tin gi\u00e0nh chi\u1ebfn th\u1eafng.<\/p>\n
1. \u0110\u1ec1 ch\u1ea1m l\u00e0 g\u00ec?<\/h2>\n
\u0110\u1ecbnh ngh\u0129a \u0111\u1ec1 ch\u1ea1m kh\u00f4ng c\u00f2n xa l\u1ea1 g\u00ec v\u1edbi nh\u1eefng ng\u01b0\u1eddi y\u00eau th\u00edch ch\u01a1i l\u00f4 \u0111\u1ec1 nh\u01b0ng tham gia l\u0129nh v\u1ef1c soi c\u1ea7u l\u00f4 \u0111\u1ec1 l\u1ea7n \u0111\u1ea7u. Kh\u00f4ng c\u00f3 g\u00ec \u0111\u00e1ng b\u1ea5t ng\u1edd n\u1ebfu \u0111\u00e2y l\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean b\u1ea1n nghe \u0111\u1ebfn thu\u1eadt ng\u1eef n\u00e0y ho\u1eb7c \u0111\u00e3 nghe lo\u00e1ng tho\u00e1ng \u0111\u00e2u \u0111\u00f3 m\u00e0 ch\u01b0a hi\u1ec3u g\u00ec v\u1ec1 n\u00f3. Th\u1ef1c t\u1ebf \u0111\u1ec1 ch\u1ea1m l\u1ea1i l\u00e0 lo\u1ea1i l\u00f4 \u0111\u1ec1 \u0111ang r\u1ea5t \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng hi\u1ec7n nay.<\/p>\n
Ch\u1ea1m l\u00e0 \u0111\u1ed9ng t\u1eeb ch\u1ec9 s\u1ef1 ti\u1ebfp x\u00fac c\u1ee7a 2 v\u1eadt v\u1edbi nhau. \u0110\u1ec1 ch\u1ea1m \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 c\u00e1c d\u00e3y s\u1ed1 \u0111\u1ec1 c\u00f9ng ch\u1ee9a 1 ho\u1eb7c nhi\u1ec1u h\u01a1n 1 con s\u1ed1 n\u00e0o \u0111\u00f3. C\u00e1c l\u00f4 s\u1ed1 \u0111\u1ec1 c\u00f9ng gi\u1ed1ng nhau v\u1ec1 con s\u1ed1 h\u00e0ng ch\u1ee5c th\u00ec \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201c\u0110\u1ec1 ch\u1ea1m \u0111\u1ea7u\u201d. C\u00f2n c\u00e1c l\u00f4 s\u1ed1 \u0111\u1ec1 m\u00e0 c\u00f9ng gi\u1ed1ng nhau con s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb th\u00ec \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201c\u0111\u1ec1 ch\u1ea1m \u0111u\u00f4i\u201d.<\/p>\n
\u0110\u1ec1 ch\u1ea1m hay \u201cch\u1ea1m \u0111\u1ec1\u201d, \u201cd\u00ednh \u0111\u1ec1\u201d l\u00e0 nh\u1eefng t\u00ean g\u1ecdi kh\u00e1c nhau t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed7i v\u00f9ng mi\u1ec1n.<\/p>\n
\u0110\u1ec3 tr\u1ea3 l\u1eddi cho c\u00e2u h\u1ecfi: D\u00e0n \u0111\u1ec1 ch\u1ea1m c\u00f3 bao nhi\u00eau c\u00f2n, c\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m g\u1ed3m con g\u00ec? \u0110\u1ed3ng th\u1eddi gi\u00fap h\u1ed9i vi\u00ean ti\u1ec7n theo d\u00f5i, d\u01b0\u1edbi \u0111\u00e2y s\u1ebd li\u1ec7t k\u00ea chi ti\u1ebft c\u00e1c \u0111\u1ec1 ch\u1ea1m \u0111\u1ea7u v\u00e0 \u0111\u1ec1 ch\u1ea1m \u0111u\u00f4i. Ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 l\u01b0u l\u1ea1i v\u00e0 s\u1eed d\u1ee5ng m\u1ed7i khi c\u1ea7n \u0111\u1ec3 h\u1ea1n ch\u1ebf thi\u1ebfu ho\u1eb7c s\u00f3t s\u1ed1.<\/p>\n
D\u00e0n \u0111\u1ec1 ch\u1ea1m \u0111\u1ea7u<\/h3>\n
<\/p>\n
\u0110\u1ec1 ch\u1ea1m 1 g\u1ed3m c\u00f3: 10 \u2013 12 \u2013 13 \u2013 14 \u2013 15 \u2013 16 \u2013 17 \u2013 18 \u2013 19<\/p>\n
\u0110\u1ec1 ch\u1ea1m 0 g\u1ed3m c\u00f3: 01 – 02 – 03 – 04 \u2013 05 \u2013 06 \u2013 07 \u2013 08 \u2013 09<\/p>\n
\u0110\u1ec1 ch\u1ea1m 2 g\u1ed3m c\u00f3: 20 \u2013 21 \u2013 23 \u2013 24 \u2013 25 \u2013 26 \u2013 27 \u2013 28 \u2013 29<\/p>\n
\u0110\u1ec1 ch\u1ea1m 3 g\u1ed3m c\u00f3: 30 \u2013 31 \u2013 32 \u2013 34 \u2013 35 \u2013 36 \u2013 37 \u2013 38 \u2013 39<\/p>\n
\u0110\u1ec1 ch\u1ea1m 4 g\u1ed3m c\u00f3: 40 \u2013 41 \u2013 42 \u2013 43 \u2013 45 \u2013 46 \u2013 47 \u2013 48 \u2013 49<\/p>\n
\u0110\u1ec1 ch\u1ea1m 5 g\u1ed3m c\u00f3: 50 \u2013 51 \u2013 52 \u2013 53 \u2013 54 \u2013 56 \u2013 57 \u2013 58 \u2013 59<\/p>\n
\u0110\u1ec1 ch\u1ea1m 6 g\u1ed3m c\u00f3: 60 \u2013 61 \u2013 62 \u2013 63 \u2013 64 \u2013 65 \u2013 67 \u2013 68 \u2013 69<\/p>\n
\u0110\u1ec1 ch\u1ea1m 7 g\u1ed3m c\u00f3: 70 \u2013 71 \u2013 72 \u2013 73 \u2013 74 \u2013 75 \u2013 76 \u2013 78 \u2013 79<\/p>\n
\u0110\u1ec1 ch\u1ea1m 8 g\u1ed3m c\u00f3: 80 \u2013 81 \u2013 82 \u2013 83 \u2013 84 \u2013 85 \u2013 86 \u2013 87 \u2013 89<\/p>\n
\u0110\u1ec1 ch\u1ea1m 9 g\u1ed3m c\u00f3: 90 \u2013 91 \u2013 92 \u2013 93 \u2013 94 \u2013 95 \u2013 96 \u2013 97 \u2013 98<\/p>\n
C\u00e1c s\u1ed1 ch\u1ea1m theo \u0111u\u00f4i<\/h3>\n
\u0110\u1ec1 ch\u1ea1m 0 g\u1ed3m c\u00f3: 10 \u2013 20 \u2013 30 \u2013 40 \u2013 50 \u2013 60 \u2013 70 \u2013 80 \u2013 90<\/p>\n
\u0110\u1ec1 ch\u1ea1m 1 g\u1ed3m c\u00f3: 01 \u2013 21 \u2013 31 \u2013 41 \u2013 51 \u2013 61 \u2013 71 \u2013 81 \u2013 91<\/p>\n
\u0110\u1ec1 ch\u1ea1m 2 g\u1ed3m c\u00f3: 02 \u2013 12 \u2013 32 \u2013 42 \u2013 52 \u2013 62 \u2013 72 \u2013 82 \u2013 92<\/p>\n
\u0110\u1ec1 ch\u1ea1m 3 g\u1ed3m c\u00f3: 03 \u2013 13 \u2013 23 \u2013 43 \u2013 53 \u2013 63 \u2013 73 \u2013 83 \u2013 93<\/p>\n
\u0110\u1ec1 ch\u1ea1m 4 g\u1ed3m c\u00f3: 04 \u2013 14 \u2013 24 \u2013 34 \u2013 54 \u2013 64 \u2013 74 \u2013 84 \u2013 94<\/p>\n
\u0110\u1ec1 ch\u1ea1m 5 g\u1ed3m c\u00f3: 05 \u2013 15 \u2013 25 \u2013 35 \u2013 45 \u2013 65 \u2013 75 \u2013 85 \u2013 95<\/p>\n
\u0110\u1ec1 ch\u1ea1m 6 g\u1ed3m c\u00f3: 06 \u2013 16 \u2013 26 \u2013 36 \u2013 46 \u2013 56 \u2013 76 \u2013 86 \u2013 96<\/p>\n
\u0110\u1ec1 ch\u1ea1m 7 g\u1ed3m c\u00f3: 07 \u2013 17 \u2013 27 \u2013 37 \u2013 47 \u2013 57 \u2013 67 \u2013 87 \u2013 97<\/p>\n
\u0110\u1ec1 ch\u1ea1m 8 g\u1ed3m c\u00f3: 08 \u2013 18 \u2013 28 \u2013 38 \u2013 48 \u2013 58 \u2013 68 \u2013 78 \u2013 98<\/p>\n
\u0110\u1ec1 ch\u1ea1m 9 g\u1ed3m c\u00f3: 09 \u2013 19 \u2013 29 \u2013 39 \u2013 49 \u2013 59 \u2013 69 \u2013 79 \u2013 89<\/p>\n
\u0110\u1ed1i v\u1edbi c\u00e1c s\u1ed1 k\u00e9p 00 \u2013 11 \u2013 22 \u2013 33 \u2013 44 \u2013 55 \u2013 66 \u2013 77 \u2013 88 \u2013 99 c\u0169ng coi nh\u01b0 1 s\u1ed1 trong d\u00e3y ch\u1ea1m \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh ch\u01a1i c\u00e1c lo\u1ea1i \u0111\u1ec1 ch\u1ea1m, ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 c\u00e2n nh\u1eafc \u0111\u01b0a v\u00e0o ch\u1ea1m \u0111\u1ea7u ho\u1eb7c ch\u1ea1m \u0111u\u00f4i.<\/p>\n
Ngo\u00e0i c\u00e1c ch\u1ea1m \u0111\u1ec1, ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 xem th\u00eam nh\u1eefng D\u00e0n \u0111\u1ec1 36 s\u1ed1 nu\u00f4i khung b\u1ea5t b\u1ea1i, 05 d\u00e0n b\u1ea5t t\u1eed h\u00fap quanh n\u0103m \u0111\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng cho m\u00ecnh.<\/p>\n
2. C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m chu\u1ea9n nh\u1ea5t<\/h2>\n
<\/p>\n
C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m gi\u1ea3i nh\u1ea5t<\/h3>\n
\u1ede \u0111\u00e2y, ng\u01b0\u1eddi ta s\u1ebd c\u0103n c\u1ee9 v\u00e0o k\u1ebft qu\u1ea3 gi\u1ea3i nh\u1ea5t c\u1ee7a k\u1ef3 m\u1edf th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc v\u00e0o ch\u1ee7 nh\u1eadt m\u1ed7i tu\u1ea7n. Ng\u01b0\u1eddi ch\u01a1i s\u1ebd t\u1ef1 th\u1ef1c hi\u1ec7n soi l\u00f4, l\u1ea5y con s\u1ed1 ch\u00ednh gi\u1eefa trong d\u00e3y s\u1ed1 gi\u1ea3i nh\u1ea5t ng\u00e0y ch\u1ee7 nh\u1eadt \u0111\u1ec3 \u0111\u00e1nh li\u00ean ti\u1ebfp \u0111\u1ebfn th\u1ee9 7 c\u1ee7a tu\u1ea7n k\u1ebf ti\u1ebfp.<\/p>\n
Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 cho ph\u00e9p ng\u01b0\u1eddi ch\u01a1i \u0103n \u0111\u1ec1 m\u1ed9t c\u00e1ch \u1ed5n \u0111\u1ecbnh trong c\u00e1c tu\u1ea7n li\u00ean ti\u1ebfp. Do \u0111\u00f3, ng\u01b0\u1eddi ch\u01a1i c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1ch n\u00e0y \u0111\u1ec3 t\u0103ng c\u01a1 h\u1ed9i l\u00e3i l\u1edbn.<\/p>\n
Ch\u1eb3ng h\u1ea1n nh\u01b0: K\u1ef3 m\u1edf th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc v\u00e0o ch\u1ee7 nh\u1eadt tu\u1ea7n n\u00e0y ra gi\u1ea3i nh\u1ea5t l\u00e0: 24395. B\u1ea1n l\u1ea5y s\u1ed1 ch\u00ednh gi\u1eefa c\u1ee7a gi\u1ea3i nh\u1ea5t l\u00e0 s\u1ed1 3 \u0111\u1ec3 nu\u00f4i \u0111\u1ec1 ch\u1ea1m 2 t\u1eeb th\u1ee9 2 cho \u0111\u1ebfn th\u1ee9 7 c\u1ee7a tu\u1ea7n k\u1ebf ti\u1ebfp.<\/p>\n
C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m b\u1eb1ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/h3>\n
\u1ede \u0111\u00e2y, c\u00e1ch ch\u01a1i n\u00e0y s\u1ebd cho ph\u00e9p b\u1ea1n c\u00f3 l\u1ee3i nhu\u1eadn trong kho\u1ea3ng 3-4 tu\u1ea7n, sau \u0111\u00f3 h\u00e3y ngh\u1ec9 kho\u1ea3ng 1-2 tu\u1ea7n r\u1ed3i l\u1ea1i ch\u01a1i ti\u1ebfp.<\/p>\n
Khi \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, b\u1ea1n s\u1ebd l\u1ea5y t\u1ed5ng c\u1ee7a c\u00e1c con s\u1ed1 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t v\u1ec1 h\u00f4m ch\u1ee7 nh\u1eadt k\u1ebft h\u1ee3p v\u1edbi \u0111u\u00f4i trong d\u00e3y s\u1ed1 \u0111\u1ec1 v\u1ec1 \u1edfth\u1ee9 6 c\u00f9ng tu\u1ea7n \u0111\u00f3, t\u1ea1o th\u00e0nh m\u1ed9t d\u00e3y l\u00f4 s\u1ed1 \u0111\u1ec1. B\u1ea1n s\u1ebd nu\u00f4i \u0111\u1ec1 ch\u1ea1m n\u00e0y t\u1eeb th\u1ee9 2 cho t\u1edbi h\u1ebft tu\u1ea7n ti\u1ebfp theo.<\/p>\n
V\u00ed d\u1ee5: K\u1ef3 quay th\u01b0\u1edfng x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc v\u00e0o ng\u00e0y th\u1ee9 6 v\u00e0 ch\u1ee7 nh\u1eadt l\u1ea7n l\u01b0\u1ee3t l\u00e0 124578 v\u00e0 24317. Nh\u01b0 v\u1eady, b\u1ea1n s\u1ebd th\u1ea5y:<\/p>\n
\u0110\u1ec1 v\u1ec1 ng\u00e0y th\u1ee9 6 l\u00e0 78, s\u1ed1 cu\u1ed1i l\u00e0 8.<\/p>\n
\u0110\u1ec1 v\u1ec1 ng\u00e0y ch\u1ee7 nh\u1eadt l\u00e0 24, t\u1ed5ng c\u00e1c s\u1ed1 \u0111\u1ec1 l\u00e0 2+4=6.<\/p>\n
B\u1ea1n gh\u00e9p 6 v\u00e0 8 t\u1ea1o th\u00e0nh b\u1ed9 s\u1ed1 68. B\u1ea1n s\u1ebd ch\u01a1i \u0111\u1ec1 ch\u1ea1m 6, 8 t\u1eeb th\u1ee9 2 cho t\u1edbi h\u1ebft tu\u1ea7n ti\u1ebfp theo.<\/p>\n
C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m b\u1eb1ng t\u1ed5ng gi\u1ea3i \u0111\u1eb7c bi\u1ec7t<\/h3>\n
Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u1ef1c k\u1ef3 d\u1ec5 th\u1ef1c hi\u1ec7n nh\u01b0ng l\u1ea1i \u0111em l\u1ea1i hi\u1ec7u qu\u1ea3 kh\u00e1 tuy\u1ec7t v\u1eddi. \u1ede \u0111\u00e2y, b\u1ea1n ch\u1ec9 vi\u1ec7c l\u1ea5y t\u1ed5ng c\u00e1c s\u1ed1 gi\u1ea3i \u0111\u1eb7c bi\u1ec7t c\u1ee7a ch\u1ee7 nh\u1eadt tu\u1ea7n b\u1ea5t k\u1ef3 n\u00e0o \u0111\u00f3 \u0111\u1ec3 l\u00e0m b\u1ed9 \u0111\u1ec1 ch\u01a1i lu\u00f4n trong tu\u1ea7n \u0111\u00f3. C\u00e1ch n\u00e0y cho ph\u00e9p b\u1ea1n c\u00f3 l\u1ee3i nhu\u1eadn trong kho\u1ea3ng 3-5 tu\u1ea7n, sau \u0111\u00f3 h\u00e3y ngh\u1ec9 2-3 tu\u1ea7n r\u1ed3i m\u1edbi n\u00ean ch\u01a1i l\u1ea1i.<\/p>\n
V\u00ed d\u1ee5: K\u1ef3 quay th\u01b0\u1edfng ng\u00e0y ch\u1ee7 nh\u1eadt ra gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u1ec1 v\u1ec1 12453, t\u1ed5ng c\u00e1c s\u1ed1 \u0111\u1ec1 l\u00e0: 1+2+4+5+3=15. N\u1ebfu \u00e1p d\u1ee5ng c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m th\u1ee9 ba n\u00e0y, b\u1ea1n s\u1ebd nu\u00f4i b\u1ed9 s\u1ed1 \u0111\u1ec1 15 v\u00e0 \u0111\u1ec1 ch\u1ea1m 1, 5. N\u1ebfu k\u1ebft qu\u1ea3 \u0111\u1ec1 v\u1ec1 18 th\u00ec t\u1ee9c l\u00e0 ch\u1ea1m 1.<\/p>\n
C\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m gi\u1ea3i nh\u1ea5t th\u1ee9 2<\/h3>\n
Nh\u1eefng ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1 l\u00e2u n\u0103m cho r\u1eb1ng c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m n\u00e0y s\u1ebd cho ph\u00e9p b\u1ea1n c\u00f3 ti\u1ec1n l\u1eddi trong kho\u1ea3ng t\u1ed1i \u0111a 7 tu\u1ea7n, sau \u0111\u00f3 h\u00e3y ngh\u1ec9 g\u1ea7n 2 tu\u1ea7n r\u1ed3i m\u1edbi \u0111\u00e1nh ti\u1ebfp, \u0103n ti\u1ebfp \u0111\u01b0\u1ee3c. Khi \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, b\u1ea1n s\u1ebd l\u1ea5y 2 ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong gi\u1ea3i nh\u1ea5t trong k\u1ebft qu\u1ea3 k\u1ef3 m\u1edf th\u01b0\u1edfng ng\u00e0y th\u1ee9 2 c\u1ee7a tu\u1ea7n n\u00e0y \u0111\u1ec3 nu\u00f4i ti\u1ebfp \u0111\u1ebfn th\u1ee9 2 c\u1ee7a tu\u1ea7n k\u1ebf ti\u1ebfp.<\/p>\n
V\u00ed d\u1ee5: K\u1ef3 quay th\u01b0\u1edfng v\u00e0o th\u1ee9 2 c\u1ee7a tu\u1ea7n tr\u01b0\u1edbc ra gi\u1ea3i nh\u1ea5t l\u00e0 b\u1ed9 s\u1ed1 \u0111\u1ec1 23521. B\u1ea1n s\u1ebd l\u1ea5y 2 s\u1ed1 \u0111\u1ea7u ti\u00ean l\u00e0 23 \u0111\u1ec3 nu\u00f4i cho \u0111\u1ebfn ng\u00e0y th\u1ee9 2 c\u1ee7a tu\u1ea7n k\u1ebf ti\u1ebfp.<\/p>\n
B\u00ean c\u1ea1nh c\u00e1c c\u00e1ch b\u1eaft \u0111\u1ec1 ch\u1ea1m, h\u1ed9i vi\u00ean c\u00f2n t\u1ed5ng h\u1ee3p nh\u1eefng kinh nghi\u1ec7m ch\u01a1i ng\u00f4 ch\u00e8 hay nh\u1ea5t t\u1eeb ng\u01b0\u1eddi ch\u01a1i l\u00e2u n\u0103m nh\u01b0:<\/p>\n<\/div>\n