Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhieu tang » chieu sang, hieu lang, nhiet nang
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
nang luan » tang luan, hang luan, nang quan
van nang » van quang, van ban, van dong
tac than » tac thanh, tac nhan, bac thanh
tam than » ban than

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)) - van nang luan thong cong ((tac than) or (tam than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (nhieu tang)) - van nang luan thong cong ((tac than) OR (tam than)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (nhieu tang)) - van nang luan thong cong ((tac than) or (tam than)) cau*.