Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
cua dang » cua ban
cong ban » cong bang, cong san, cong tan
than tap » toan tap, han tap, than cap
phan tap » phan lap, han tap, pha tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh tang ((cua dang) OR (cua cong)) cong ban ((than tap) OR (phan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh tang ((cua dang) or (cua cong)) cong ban ((than tap) OR (phan tap))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh tang ((cua dang) or (cua cong)) cong ban ((than tap) OR (phan tap))*.