Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
manh chung » manh hung, lanh chung, doanh chung
chuan bang » chuan trang, can bang, chu bang
chua bang » chu bang, chua nang, chua xang
san thanh » ban thanh, van thanh, son thanh
thanh cao » thanh ca, thanh cac, thanh thao
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dieu hanh) or (chieu xanh)) - manh chung ((chuan bang) OR (chua bang)) cong san thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dieu hanh) OR (chieu xanh)) - manh chung ((chuan bang) OR (chua bang)) cong san thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((dieu hanh) or (chieu xanh)) - manh chung ((chuan bang) OR (chua bang)) cong san thanh cao".
• Adding a wildcard symbol may retrieve word variants: doc ((dieu hanh) or (chieu xanh)) - manh chung ((chuan bang) OR (chua bang)) cong san thanh cao*.