Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
trung cua » truong cua, trung tuan, trung cap
dang cong » dung cong
cua dang » cua cong, cua ban
cong tac » cong ty
tuan cao » juan cao, quang cao, thuan cam
toan cao » toan ban, toan tap

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