Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trung » thanh trung, hanh trang, manh trung
trung cap » truong cao, trung tam
dung cong » dung trong
cong dang » cong dong, cong dan, cong dung
cap dung » ap dung, cao dung, chan dung
dang van » hoang van, hang va

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

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