Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chinh » do chinh, tai chinh, hoc chinh
cong tac » cong ty
chan ban » can ban, chat ban, chan doan
chan nan » chan nhan, chang nang, chan doan
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chinh sach - hanh trinh ((va hang) or (va lang)) cong tac ((chan ban) OR (chan nan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - hanh trinh ((va hang) OR (va lang)) cong tac ((chan ban) OR (chan nan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - hanh trinh ((va hang) or (va lang)) cong tac ((chan ban) OR (chan nan))".
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - hanh trinh ((va hang) or (va lang)) cong tac ((chan ban) OR (chan nan))*.