Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
tieu xanh » tieu danh, chieu xanh, dieu hanh
dung cong » dung trong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - ((hanh trang) or (hanh trinh)) qua dung cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((hanh trang) OR (hanh trinh)) qua dung cong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((hanh trang) or (hanh trinh)) qua dung cong tap toan cao*.