Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
tran tuan » tran xuan, tran quang, tran thanh
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
tran tap » toan tap, tran tan, trang tai

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