Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
manh trung » manh tung, thanh trung, manh hung
dung cong » dung trong
trung su » trung vu, trong su, trung du
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 ((chieu sang) or (((chiet tach) or (chinh sach)))) - manh trung su dung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (((chiet tach) OR (chinh sach)))) - manh trung su dung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (((chiet tach) or (chinh sach)))) - manh trung su dung cong dan van ban*.