Perhaps you should try some spelling variations:
hanh trinh » canh tranh
theo chieu » theo tieu, ho chieu, thi chieu
dung cong » dung trong
theo chu » cho chu, chao chu, theo yeu
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tap » toan tap, han tap, phan tap
va dung » van dung, va duong, vat dung

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 chieu) OR (theo chu)) xanh - ((hanh trinh) OR (hanh chinh)) va dung cong tan than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) xanh - ((hanh trinh) or (hanh chinh)) va dung cong tan than tap~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) xanh - ((hanh trinh) or (hanh chinh)) va dung cong tan than tap*.