Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cho thuc » choi thuc, cho thue, co thuc
trinh va » trinh van, trinh vat, trinh ve
cong van » cong vang, song van, cong tan
cong san » cong tac
va hang » van hang, va nang, va lang
tan cau » toan cau, van cau, tan ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: cho thuc hanh - hanh trinh va hang ((cong van) or (cong san)) tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho thuc hanh - hanh trinh va hang ((cong van) OR (cong san)) tan cau.
• Adding a wildcard symbol may retrieve word variants: cho thuc hanh - hanh trinh va hang ((cong van) or (cong san)) tan cau*.