Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
trung ha » trung hoc, trung tam, trung cap
ha thong » hoa thong, nha thong, he thong
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (nhieu tang)) - thanh trung ha thong ((cong tan) OR (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh trung ha thong ((cong tan) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (nhieu tang)) - thanh trung ha thong ((cong tan) OR (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - thanh trung ha thong ((cong tan) OR (cong tac)) toan cao*.