Perhaps you should try some spelling variations:
"johannes pfister muller" » "johanne foster muller", "johannes fischer muller", "johannes koster muller", "johannes pfisters muhle", "johannes pachter muller"
"johannes dieter muller" » "johannes dietlein muller", "johannes richter muller", "johannes der muller", "johannes dietmar muller", "johannes gunter muller"
"johannes peter muller" » "johann peter muller", "johannes beutler muller", "johannes pantel muller", "johannes peter miller", "johannes heiner muller", "johannes geiger muller"
"johannes peter koller" » "johann peter koller", "johannes beutler koller", "johannes pantel koller"

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 pfister muller") OR ("johannes dieter muller"))) OR ((("johannes peter muller") OR ("johannes peter koller")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"johannes pfister muller\") or (\"johannes dieter muller\"))) or (((\"johannes peter muller\") OR (\"johannes peter koller\"))))".
• Removing quotes may allow a broader search: (((( johannes pfister muller ) or ( johannes dieter muller ))) or ((( johannes peter muller ) OR ( johannes peter koller )))).
• Adding a wildcard symbol may retrieve word variants: (((("johannes pfister muller") or ("johannes dieter muller"))) or ((("johannes peter muller") OR ("johannes peter koller"))))*.