Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sach » chinh sach, chiet tach, chieu sang
chuc danh » chuc nganh, thuc hanh, chuc nang
bang luat » bang luan, tang luat, nang suat
manh toan » thanh toan, anh tuan, tinh toan
anh bang » anh hoang, anh quang, tinh bang
dan toan » van toan, dan than, xuan toan

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: theo ((chuc danh) OR (chieu sach)) - anh bang luat thuong cong ((dan toan) OR (manh toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc danh) or (chieu sach)) - anh bang luat thuong cong ((dan toan) OR (manh toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chieu sach)) - anh bang luat thuong cong ((dan toan) OR (manh toan)) cao*.