Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong cao » truong dai
hang dong » hang nong, hang cong, lang dong
hanh dong » anh dong, ha dong
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung tam, trung cap
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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 - thanh ((trung ha) or (truong cao)) ((hang dong) OR (hanh dong)) tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung ha) OR (truong cao)) ((hang dong) OR (hanh dong)) tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung ha) or (truong cao)) ((hang dong) OR (hanh dong)) tac than cap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung ha) or (truong cao)) ((hang dong) OR (hanh dong)) tac than cap*.