Gi\u1ea3i \u0110\u1ecba L\u00ed 10 B\u00e0i 4: Th\u1ef1c h\u00e0nh: X\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p bi\u1ec3u hi\u1ec7n c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecba k\u00ed tr\u00ean b\u1ea3n \u0111\u1ed3<\/a><\/blockquote>