Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong dang » cong dong, cong dan, cong dung
tranh va » tranh van, trang va, trinh va
dang van » hoang van, hang va
va dung » van dung, va duong, vat dung

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 xanh) or (hieu lang)) - canh tranh va dung cong dang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu lang)) - canh tranh va dung cong dang van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu lang)) - canh tranh va dung cong dang van ban*.