Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
van nhung » van nhuong, va nhung, van hung
tran chau » tranh chap, tran huu
tang van » dang van, hoang van, trong van
cong tan » cong tac, cong san, cong thanh
tran cau » toan cau, ran cau, tra 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 tang van nhung cong tan ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu sach)) - hanh tang van nhung cong tan ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (chieu sach)) - hanh tang van nhung cong tan ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - hanh tang van nhung cong tan ((tran cau) OR (tran chau))*.