Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cao » truong cao, trung cap, trung co
cao nhung » cho nhung, cam nhung, cao chung
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh 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 cao nhung cong tan ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh trung cao nhung cong tan ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh trung cao nhung cong tan ((than cau) or (than cap))*.