Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
vien thanh » viet thanh, tien thanh, dien thanh
hanh hinh » hanh chinh, hanh tinh, hanh dinh
hinh luat » hanh luat, trinh luat, chinh luan
luat dung » suat dung, luat chung, luat quang
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) or (vien thanh)) - hanh hinh luat dung ((trong dan) OR (trong san)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (vien thanh)) - hanh hinh luat dung ((trong dan) OR (trong san)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) or (vien thanh)) - hanh hinh luat dung ((trong dan) OR (trong san)) van ban".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (vien thanh)) - hanh hinh luat dung ((trong dan) OR (trong san)) van ban*.