Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
hung cuong » hung vuong, hong cuong, hung luong
anh hoang » thanh hoang, minh hoang, tnhh hoang
hoang anh » hoang minh, hoang van
hung cong » nhung cong, phung cong, dung cong
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (nhieu tang)) - anh hoang anh ((hung cong) or (hung cuong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (nhieu tang)) - anh hoang anh ((hung cong) OR (hung cuong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (nhieu tang)) - anh hoang anh ((hung cong) or (hung cuong)) tac toan cau*.