Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
nhieu tang » chieu sang, nhiet nang
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, hieu van
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac
tung va » trung va, tuong va, dung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (nhieu tang)) - thanh tung va thuong cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - thanh tung va thuong cong tan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (nhieu tang)) - thanh tung va thuong cong tan than cap*.