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

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: (("ambulanter" OR (("ambulantenr" OR "ambulantes") OR "ambulanzen")) OR "ambulante").
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ambulanter\" or ((\"ambulantenr\" OR \"ambulantes\") or \"ambulanzen\")) or \"ambulante\")".
• Removing quotes may allow a broader search: (( ambulanter or (( ambulantenr OR ambulantes ) or ambulanzen )) or ambulante ).
• Adding a wildcard symbol may retrieve word variants: (("ambulanter" or (("ambulantenr" OR "ambulantes") or "ambulanzen")) or "ambulante")*.