Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, hanh mang, hanh tung
cua khong » hua khong, cua phuong, cua thuong
anh tang » anh bang, anh dang, anh nang
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.

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