C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 ch\u00ednh x\u00e1c nh\u1ea5t<\/h2>\n
\u0110\u00e1nh l\u00f4 \u0111\u1ec1, ch\u00fang ta kh\u00f4ng th\u1ec3 \u0111\u00e1nh cho c\u00f3. Kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh theo ki\u1ec3u th\u00edch th\u00ec \u0111\u00e1nh, th\u00edch con n\u00e0o \u0111\u00e1nh con \u0111\u00f3. Nh\u01b0 v\u1eady kh\u00f4ng hi\u1ec7u qu\u1ea3, m\u00e0 ch\u1ec9 ti\u1ec1n m\u1ea5t m\u00e0 th\u00f4i.<\/p>\n