Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tranh van » tran van, trinh van, thanh van
van thong » van thuong, van phong, va thong
cuong tap » luong tap, luong tai, cong tan
cong tap » cong tan, tong tap, con tap
cong tac » cong ty
toan cao » toan ban, toan tap

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: theo tieu xanh - canh tranh van thong ((((cong tap) OR (cuong tap))) OR (cong tac)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - canh tranh van thong ((((cong tap) OR (cuong tap))) or (cong tac)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - canh tranh van thong ((((cong tap) OR (cuong tap))) or (cong tac)) toan cao*.