Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua dang » cua cong, cua ban
cong tac » cong ty
cong tan » cong san, cong ty, cong ha
than cau » toan cau, phan cau, than cap
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 - thanh trung cua dang ((cong tac) OR (((cong thanh) OR (cong tan)))) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh trung cua dang ((cong tac) or (((cong thanh) OR (cong tan)))) than cau~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung cua dang ((cong tac) or (((cong thanh) OR (cong tan)))) than cau*.