Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh vat » trinh vat, tranh va, tranh van
cong dang » cong dong, cong dung, cong danh
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (hieu lang)) - canh tranh vat dung ((cong dang) OR (cong dan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (hieu lang)) - canh tranh vat dung ((cong dang) OR (cong dan)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (hieu lang)) - canh tranh vat dung ((cong dang) OR (cong dan)) van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (hieu lang)) - canh tranh vat dung ((cong dang) OR (cong dan)) van ban*.