Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tran hong » tran hoang, tran trong, tranh hang
anh bang » anh hoang, anh quang, tinh bang
cua dung » cua dang, cua dong, qua dung
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - ((anh bang) or (tran hong)) cua dung ((cong tan) OR (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((anh bang) OR (tran hong)) cua dung ((cong tan) OR (cong tac)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - ((anh bang) or (tran hong)) cua dung ((cong tan) OR (cong tac)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((anh bang) or (tran hong)) cua dung ((cong tan) OR (cong tac)) toan cao*.