Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
dung cong » dung trong
trung va » truong va, trang va, trung ha
cong san » cong tac
tang cau » hang cau, bang cau, nang cau
va dung » van dung, va duong, vat dung
tang ca » tang cua, hang ca, tang ma

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