Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
doan tien » doan thien, doanh tien, doan dien
trinh tai » trinh toan, trinh tu, trinh han
tai nhung » thai nhung, thi nhung, tai hung
manh toan » thanh toan, anh tuan, tinh 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: ((doan tien) OR (toan tien)) thinh - hanh trinh tai nhung cong ((manh toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doan tien) OR (toan tien)) thinh - hanh trinh tai nhung cong ((manh toan) or (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((doan tien) OR (toan tien)) thinh - hanh trinh tai nhung cong ((manh toan) or (dan than)) cau*.