Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thue manh » thue thanh, chu manh, thuy anh
trinh vat » trinh van, trinh luat, sinh vat
vat hang » van hang, dat hang, va hang
cong van » cong vang, song van, cong tan
cong san » cong tac
tan cau » toan cau, van cau, tan ca

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: cho ((thue manh) OR (thuc hanh)) - hanh trinh vat hang ((cong van) OR (cong san)) tan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho ((thue manh) OR (thuc hanh)) - hanh trinh vat hang ((cong van) or (cong san)) tan cau~".
• Adding a wildcard symbol may retrieve word variants: cho ((thue manh) OR (thuc hanh)) - hanh trinh vat hang ((cong van) or (cong san)) tan cau*.