không có quan trọng 
to be unimportant [ không ] : (1) no, not; (question tag); (2) air; (3) empty
[ có ] : to be, have, exist; there is, there are
[ quan ] : (1) official, officer; (2) franc (unit of currency); (3) coffin; (4) sense
[ trọng ] : heavy, important; to think high of, hold in esteem
Most Common Compounds Set 1:
Most Common Compounds Set 2 :