Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, doi chi, ho chieu
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
chinh can » chinh ca, chinh ban, chinh cau
cong san » cong tac

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 - canh tranh ((cua khong) OR (hua khong)) ((cong san) or (cong thanh)) chinh can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tranh ((cua khong) OR (hua khong)) ((cong san) OR (cong thanh)) chinh can.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh ((cua khong) OR (hua khong)) ((cong san) or (cong thanh)) chinh can".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh ((cua khong) OR (hua khong)) ((cong san) or (cong thanh)) chinh can*.