Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh thi » trinh tai, dinh thi, trinh tin
ho chieu » theo chieu, hoc thieu, doi chieu
trinh tu » trinh ky, trinh do
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac

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: ho chieu sach - thanh ((trinh thi) OR (trinh tu)) chung ((cong ban) OR (cong tan)) than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trinh thi) or (trinh tu)) chung ((cong ban) OR (cong tan)) than cap~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trinh thi) or (trinh tu)) chung ((cong ban) OR (cong tan)) than cap*.