Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh luan » trinh quan, trinh han, trinh toan
cong thanh » dong thanh, cong trinh, truong thanh
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong ty
than cau » toan cau, phan cau, 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: ho chieu sach - hanh ((trinh luan) or (trinh luat)) dong ((cong tan) OR (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh luan) OR (trinh luat)) dong ((cong tan) OR (cong thanh)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh luan) or (trinh luat)) dong ((cong tan) OR (cong thanh)) than cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh luan) or (trinh luat)) dong ((cong tan) OR (cong thanh)) than cau*.