Perhaps you should try some spelling variations:
nhung trong » hung trong, nhung tuong, thuong trong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tang luan » dung luan
van thanh » van tuan
ban thanh » ban hanh, ban hang
dung cua » dung luan, dung cho

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