Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thanh dung » thanh duong, thanh tung, thanh hung
dung thanh » duong thanh, dong thanh, dang thanh
thanh quan » thanh xuan, thanh tuan, nhanh quang
quan luong » luan luong, quan long, quan duong
hieu lang » chieu sang, hieu quang, hieu van
luong va » dung va
toan tap » toan ban
va toan » van toan, bai toan, tap toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((nhieu tang) or (hieu lang)) - thanh dung thanh quan luong va toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((nhieu tang) OR (hieu lang)) - thanh dung thanh quan luong va toan tap.
• Adding a wildcard symbol may retrieve word variants: doi ((nhieu tang) or (hieu lang)) - thanh dung thanh quan luong va toan tap*.