Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
hanh dung » thanh dung, anh dung, hanh dong
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
dung cua » dung luan, dung cho
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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