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, cua rung, cua nhung
cua dang » cua cong, cua ban
qua dung » quang dung, su dung, qua song
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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 sinh ((((cua dung) OR (cua dang))) OR (qua dung)) cong tap toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh sinh ((((cua dung) OR (cua dang))) or (qua dung)) cong tap toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh sinh ((((cua dung) OR (cua dang))) or (qua dung)) cong tap toan cao*.