Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan ban » van ban
tang va » trang va, tang van, thang va
va hang » van hang, va nang, va lang

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 va hang ((cong tan) OR (cong tac)) ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang va hang ((cong tan) OR (cong tac)) ((toan tap) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang va hang ((cong tan) OR (cong tac)) ((toan tap) or (toan ban))*.