Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tong » hanh trong, han tong, hanh dong
tong quan » thong quan, tong luan, luong quan
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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 tong quan ((nhung tuong) OR (hoang vuong)) ((dan than) OR (van than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh tong quan ((nhung tuong) or (hoang vuong)) ((dan than) OR (van than)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh tong quan ((nhung tuong) or (hoang vuong)) ((dan than) OR (van than)) cau*.