Perhaps you should try some spelling variations:
truong dao » truong cao, truong bo
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung dai » trung tam, trung cap, trung ha
nho hieu » nha hieu, nho sieu, nhu hieu
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu lang - thanh ((((trung dai) OR (truong dai))) or (truong dao)) nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - thanh ((((trung dai) OR (truong dai))) OR (truong dao)) nhung cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho hieu lang - thanh ((((trung dai) OR (truong dai))) or (truong dao)) nhung cong san van ban".
• Adding a wildcard symbol may retrieve word variants: nho hieu lang - thanh ((((trung dai) OR (truong dai))) or (truong dao)) nhung cong san van ban*.