Perhaps you should try some spelling variations:
doanh tien » doanh tren, doanh vien, doanh chien
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
trinh tai » trinh toan, trinh tu, trinh han
dung cong » dung trong
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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: doanh tien thinh - hanh trinh tai ((nhung cong) OR (dung cong)) san toan cau~.
• Adding a wildcard symbol may retrieve word variants: doanh tien thinh - hanh trinh tai ((nhung cong) or (dung cong)) san toan cau*.