Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
duong cong » dung cong, luong cong, duong trong
hanh dung » thanh dung, anh dung, hanh dong
dong cong » dung cong, dang cong, cong cong
thanh hoa » thanh pho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - hanh dung luan ((dong cong) OR (duong cong)) thanh hoa dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - hanh dung luan ((dong cong) OR (duong cong)) thanh hoa dan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sang)) - hanh dung luan ((dong cong) OR (duong cong)) thanh hoa dan".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - hanh dung luan ((dong cong) OR (duong cong)) thanh hoa dan*.