Perhaps you should try some spelling variations:
ambulante » ambulanten
ambulantenr » ambulantennr, ambulanten, ambulanter, ambulantem
ambulantes » ambulantens, ambulanten, ambulanter, ambulance
ambulanzen » ambulanten, ambulanter, ambulance

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: ( ambulante OR (( ambulantenr OR ambulanzen ) OR ambulantes ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "( ambulante or (( ambulantenr OR ambulanzen ) or ambulantes ))*".