Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
lieu tinh » trieu tinh, diep tinh, bien tinh
ganh nang » anh nang, nganh nong, van nang
nang luan » tang luan, hang luan, nang quan
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((lieu tinh) or (chieu sach)) - ganh nang luan chung cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((lieu tinh) OR (chieu sach)) - ganh nang luan chung cong tac than cau.
• Adding a wildcard symbol may retrieve word variants: doi ((lieu tinh) or (chieu sach)) - ganh nang luan chung cong tac than cau*.