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, biet lang
quan toan » quang toan, quan doan, xuan toan
hieu van » hieu va, thien van, lieu va
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 (hieu van))) 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 (hieu van))) OR (nhieu tang)) - thanh trung tam dung trong quan toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu lang) OR (hieu van))) or (nhieu tang)) - thanh trung tam dung trong quan toan ban*".