phân biệt ra chuyện phải trái 
to know right from wrong [ phân ] : to distribute, divide
[ biệt ] : (1) separated, isolated; (2) to disappear
[ ra ] : to go out, exit, give, issue, emit, leave
[ chuyện ] : story, conversation, situation, issue, matter; to talk, converse, communicate
[ phải ] : (1) correct, right (opposite of left), right (opposite of wrong); (2) must, have to
[ trái ] : [CL for bombs, grenades, fruit]; left (opposite of right); against, contrary to, wrong
Most Common Compounds Set 1:
Most Common Compounds Set 2 :