Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong tap » cuong tap, cong tac, cong tan
toan cao » toan tap
toan ban » van ban

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