Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
thi chieu » thi chien, thi hieu, theo chieu
trong dan » trong dang, trong san, trong tan
qua dung » quang dung, su dung, qua song
dan toan » van toan, dan than, manh toan
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (thi chieu)) xanh - ((hanh tranh) or (hanh trinh)) qua dung trong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (thi chieu)) xanh - ((hanh tranh) OR (hanh trinh)) qua dung trong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (thi chieu)) xanh - ((hanh tranh) or (hanh trinh)) qua dung trong dan toan ban*.