Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
trinh ve » trinh va, trinh vi, trinh viet
trinh he » trinh han, trinh hoa, trinh thi
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: ho chieu sach - hanh ((trinh ve) or (trinh he)) thong ((cong dan) OR (cong tan)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh ve) OR (trinh he)) thong ((cong dan) OR (cong tan)) than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh ve) or (trinh he)) thong ((cong dan) OR (cong tan)) than cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh ve) or (trinh he)) thong ((cong dan) OR (cong tan)) than cao*.