Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
cua dang » cua cong
cong ban » cong bang, cong san, cong tan
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh trung ((cua ban) or (cua dang)) cong ban ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh trung ((cua ban) OR (cua dang)) cong ban ((than cap) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh trung ((cua ban) or (cua dang)) cong ban ((than cap) or (khan cap))*.