Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
truong cao » truong dai
hieu sach » chieu sach, dien sach, hieu cac
hieu cach » hieu cac, chieu sach, hieu ca
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
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: doc ((hieu sach) or (hieu cach)) - thanh ((trung tuan) or (truong cao)) trong cong ban than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (hieu cach)) - thanh ((trung tuan) OR (truong cao)) trong cong ban than cap.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (hieu cach)) - thanh ((trung tuan) or (truong cao)) trong cong ban than cap*.