Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
doanh luan » doanh nhan
hieu cach » hieu cac, chieu sach, hieu ca
luan dang » luan nang, luan danh, luan dong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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 hieu cach - doanh doanh luan dang ((cong dan) OR (cong tan)) toan cao~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - doanh doanh luan dang ((cong dan) or (cong tan)) toan cao*.