Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
va hang » van hang, 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: hoc hieu manh - ((hanh trinh) or (thanh trung)) va hang ((cong dan) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh trinh) OR (thanh trung)) va hang ((cong dan) OR (cong tan)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh trinh) or (thanh trung)) va hang ((cong dan) or (cong tan)) toan ban*.