Perhaps you should try some spelling variations:
hanh trinh » canh tranh
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
qua dung » quang dung, su dung, qua song
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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