Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

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