Perhaps you should try some spelling variations:
johannes fischer » johanna fischer, johannes fechner, johannes liesche
johannes pfister » johanne foster, johannes dieter, johannes koster
johan fischer » johanna fischer, johann fischart, johan richter

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: ((((johannes fischer) OR (johannes pfister))) OR (johan fischer)).
• Adding a wildcard symbol may retrieve word variants: ((((johannes fischer) or (johannes pfister))) or (johan fischer))*.