Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » hanh trinh, hanh trang, lanh tranh
doi chieu » doc hieu, doi chi, ho chieu
van dung » van dong, xay dung, tin dung
cong van » cong vang, song van, cong tan
cong san » cong tac
than man » than ma, thanh san, tran manh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((hanh tranh) OR (canh tranh)) van dung ((cong van) OR (cong san)) than man~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((hanh tranh) or (canh tranh)) van dung ((cong van) OR (cong san)) than man~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((hanh tranh) or (canh tranh)) van dung ((cong van) OR (cong san)) than man*.