Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh han » hanh nhan, hanh phan, hanh san
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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 chieu sach - hanh han ((cua dung) OR (cua dang)) cong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh han ((cua dung) OR (cua dang)) cong ((dan than) or (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh han ((cua dung) OR (cua dang)) cong ((dan than) or (ban than)) cau*.