Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
kien sach » dien sach, vien bach, kien mac
trung cua » truong cua, trung tuan, trung cap
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
san than » sang than, san thanh, ban than
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: hoc ((chieu sach) or (kien sach)) - thanh trung cua ((hang cong) or (dang cong)) san than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (kien sach)) - thanh trung cua ((hang cong) OR (dang cong)) san than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (kien sach)) - thanh trung cua ((hang cong) or (dang cong)) san than cap*.