C\u00e1ch \u0111\u00e1nh \u0111\u1ec1 ng\u00e0y n\u00e0o c\u0169ng tr\u00fang<\/h2>\n
Trong b\u1ed9 m\u00f4n x\u1ed5 s\u1ed1, ch\u00fang ta s\u1ebd chia ra 2 l\u0129nh v\u1ef1c \u0111\u1ec3 \u0111\u1ea7u t\u01b0 g\u1ed3m: \u0111\u00e1nh l\u00f4 v\u00e0 \u0111\u00e1nh \u0111\u1ec1. Ph\u1ea7n n\u00e0y t\u00f4i s\u1ebd gi\u00fap anh em tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u00e1nh \u0111\u1ec1 tr\u00fang<\/strong>?<\/p>\n