Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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 chieu sach - hanh trung ((cua nhung) OR (va nhung)) cong dan than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trung ((cua nhung) OR (va nhung)) cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trung ((cua nhung) OR (va nhung)) cong dan than cao*.