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 hoc » trung quoc
tang cong » tang cuong, trang cong, dang cong
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
hoc tang » hoc bang, hoc tan, hoc tieng
than cau » toan cau, phan cau, than cap

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