Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh thanh, dong doanh
doanh hoan » doanh khoa, doanh nhan, doanh luan
hieu lang » chieu sang, hieu quang, nhieu tang
cua trong » cua truong, cua trung, qua trong
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - ((doanh doanh) OR (doanh hoan)) cua trong cong ban ((than cau) OR (than cap))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((doanh doanh) or (doanh hoan)) cua trong cong ban ((than cau) or (than cap))*.