Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((canh tranh) OR (thanh trung)) ((va thong) OR (va phuong)) cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((canh tranh) or (thanh trung)) ((va thong) OR (va phuong)) cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((canh tranh) or (thanh trung)) ((va thong) OR (va phuong)) cong dan toan cao*.