Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh nang » ganh nang, hanh mang, hanh trang
dung cong » dung trong
anh nang » ganh nang, anh bang, anh dang
cua dung » cua dang, cua dong, qua dung
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » 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 - ((hanh nang) or (anh nang)) cua dung cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((hanh nang) OR (anh nang)) cua dung cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hanh nang) or (anh nang)) cua dung cong tap toan cau*.