Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
dong cong » duong cong, dang cong, cong cong
dung cong » dung trong
khan cap » khan ap, than cap, khoan cam
khan dam » thanh dam, chang dam, khanh nam
anh ban » anh bang, anh bai, anh van
ban cua » ban quan

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 - anh ban cua ((dong cong) or (dung cong)) dan ((khan cap) or (khan dam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh ban cua ((dong cong) OR (dung cong)) dan ((khan cap) OR (khan dam)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - anh ban cua ((dong cong) or (dung cong)) dan ((khan cap) or (khan dam))*.