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
dung cong » dung trong
dan thanh » dang thanh, danh thanh, ban thanh
thanh cac » hanh cac, thanh bac, thanh ca
trung ap » trung cap, trung lap, trung tam
cong dan » cong san, cong tan, huong dan
ap dung » xay dung, van dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu lang) or (nhieu tang)) - thanh trung ap dung cong dan thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (nhieu tang)) - thanh trung ap dung cong dan thanh cac.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (nhieu tang)) - thanh trung ap dung cong dan thanh cac*.