Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, thi chieu
trung cua » truong cua, trung tuan, trung cap
theo chu » cho chu, chao chu, theo yeu
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) sach - thanh trung cua ban ((cong tan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) sach - thanh trung cua ban ((cong tan) OR (cong san)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) sach - thanh trung cua ban ((cong tan) OR (cong san)) toan cao*.