Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tai thiet » tao thiet, tay thiet, toan thiet
hanh tran » hanh trang, thanh tran, hanh tram
thanh tra » thanh toan, thanh hoa
trong tan » trong quan, trong cac, trong ca
van dung » van dong, xay dung, tin dung
tran ban » tranh ban, tran van, toan ban

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (tai thiet)) tach - ((hanh tran) OR (thanh tra)) van dung trong tan tran ban~.
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (tai thiet)) tach - ((hanh tran) or (thanh tra)) van dung trong tan tran ban*.