Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sach » chinh sach, chiet tach, chieu sang
tong cong » trong cong, cong cong, dung cong
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
ho chieu » theo chieu, hoc thieu, doi chieu
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 tam) or (trung thanh)) tong cong lang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung tam) OR (trung thanh)) tong cong lang than cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung tam) or (trung thanh)) tong cong lang than cap*.