Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
trung cap » truong cao, trung tam
dang cong » dung cong
cong dang » cong dong, cong dan, cong dung
cap dang » cao dang, cac dang, cap bang
dang van » hoang van, hang va
van dat » van dao, van dau, dan dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (dieu hanh)) - hanh trung cap dang cong dang van dat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (dieu hanh)) - hanh trung cap dang cong dang van dat*.