Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
hanh dung » anh dung, hanh dong, manh dung
ban cong » bang cong, van cong, phan cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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