Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doi chi, ho chieu, mot chieu
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
tran tuan » tran xuan, tran quang, tran thanh
doc hieu » toc thieu, hoc thieu, hoc hien
cong tan » cong tac, cong thanh, cong ty
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: ((doi chieu) OR (doc hieu)) sach - thanh trung cua nhung ((cong tan) or (cong san)) tran tuan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) sach - thanh trung cua nhung ((cong tan) OR (cong san)) tran tuan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) sach - thanh trung cua nhung ((cong tan) or (cong san)) tran tuan".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) sach - thanh trung cua nhung ((cong tan) or (cong san)) tran tuan*.