Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
truong dao » truong dai, truong cao, truong bo
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
trung dai » truong dai, trung tam, trung cap
cong luan » tong luan, cong tuan, dong luan

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