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

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 tong ((quan doan) OR (chuan doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - thanh trung tam dung tong ((quan doan) OR (chuan doan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (nhieu tang)) - thanh trung tam dung tong ((quan doan) OR (chuan doan)) cau*".