Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
khoan cam » khoa cam, khoan va, phan cam
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
pho may » cho may, pho mac, tho may
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: pho may tinh - hanh trinh va dang ((cong dan) or (cong tan)) khoan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: pho may tinh - hanh trinh va dang ((cong dan) OR (cong tan)) khoan cam.
• Adding a wildcard symbol may retrieve word variants: pho may tinh - hanh trinh va dang ((cong dan) or (cong tan)) khoan cam*.