Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hanh dang » hanh dong, anh dang, hanh dung
van nhung » van nhuong, va nhung, van hung
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (chieu sach)) - hanh dang van nhung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu sach)) - hanh dang van nhung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - hanh dang van nhung cong tan tran cau*.