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
dang cong » dung cong
thanh cha » thanh ha, thanh nha, thanh phan
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap
va dang » van dang, va nang, va lang

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 va dang cong dan ((thanh cha) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh trung va dang cong dan ((thanh cha) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - thanh trung va dang cong dan ((thanh cha) or (toan cau))*.