Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
dong doanh » dung doanh, trong doanh, doanh doanh
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
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 - ((dong doanh) OR (doanh hoan)) cua cong cong ban ((than cau) OR (than cap))~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((dong doanh) or (doanh hoan)) cua cong cong ban ((than cau) or (than cap))*.