Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
trong quan » thong quan, tong quan, thong quang
hieu lang » chieu sang, hieu quang, hieu van
quan toan » quang toan, quan doan, xuan toan
tam dung » tam duong, tac dung, tan dung
toan ban » van ban

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 tam dung trong quan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh trung tam dung trong quan toan ban*.