Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, mot chieu
tuan dang » tran dang, tuan bang, tuan dung
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) sach - thanh trung tuan dang ((cong san) or (huong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - thanh trung tuan dang ((cong san) OR (huong dan)) toan tap.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - thanh trung tuan dang ((cong san) or (huong dan)) toan tap*.