Perhaps you should try some spelling variations:
dong thanh » truong thanh
tieu xanh » tieu danh, chieu xanh, dieu hanh
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
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 tang cua dung ((((cong tan) or (dong thanh))) or (cong tac)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - anh tang cua dung ((((cong tan) OR (dong thanh))) OR (cong tac)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - anh tang cua dung ((((cong tan) or (dong thanh))) or (cong tac)) toan cao*.