Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hoi hieu » hoi phieu, hoi tieu, moi hieu
cua nong » cua cong, cuu nong, cua dong
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - thanh trung cua nong ((cong tan) or (cong tac)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh trung cua nong ((cong tan) OR (cong tac)) van ban*.