Perhaps you should try some spelling variations:
thanh tung » thanh cong
dong thanh » truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
nho hieu » nha hieu, nho sieu, nhu hieu
tung cua » trung cua, tuong cua, dung cua
cua dang » cua cong, cua ban
cong tac » cong ty
than cau » toan cau, phan cau, than cap

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: nho hieu lang - thanh tung cua dang ((cong tac) OR (dong thanh)) than cau~.
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - thanh tung cua dang ((cong tac) or (dong thanh)) than cau*.