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
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than ban » thanh ban, toan ban, than man

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)) su dung cong tan than 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)) su dung cong tan than ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (thi chieu)) xanh - ((hanh tranh) or (hanh trinh)) su dung cong tan than ban*.