Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luong quan » thong quan, duong qua
doi chieu » doc hieu, doi chi, ho chieu
dung quan » dung quang, dung luan, dang quang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan tap » toan ban

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 - thanh ((dung quan) OR (luong quan)) nhung ((cong tan) or (cong tac)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((dung quan) OR (luong quan)) nhung ((cong tan) OR (cong tac)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((dung quan) OR (luong quan)) nhung ((cong tan) or (cong tac)) toan tap".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((dung quan) OR (luong quan)) nhung ((cong tan) or (cong tac)) toan tap*.