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, hang cong
hanh dung » thanh dung, anh dung, hanh dong
hung cong » hung cuong, phung cong, dung cong
dung van » duong van, dung va, dang van
dan toan » van toan, dan than, manh toan

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