Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
van nhuong » van chuong, van phuong, van huong
cong thanh » dong thanh, cong trinh, truong thanh
hanh dang » hanh dong, anh dang, hanh dung
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong ty
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 nhuong ((cong thanh) OR (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 nhuong ((cong thanh) OR (cong tan)) tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (chieu sach)) - hanh dang van nhuong ((cong thanh) OR (cong tan)) tran cau".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - hanh dang van nhuong ((cong thanh) OR (cong tan)) tran cau*.