Perhaps you should try some spelling variations:
thanh trung » thanh tung
sinh sach » chinh sach, sinh san, sang sach
trung cua » truong cua, trung tuan, trung cap
cong lang » cong vang, cong luong, cong quang
chinh can » chinh ca, chinh ban, chinh cau
cua hang » cua dang, cua nhung, cua cong
cong san » cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - thanh trung cua hang ((cong lang) or (cong san)) chinh can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - thanh trung cua hang ((cong lang) OR (cong san)) chinh can.
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - thanh trung cua hang ((cong lang) or (cong san)) chinh can*.