Perhaps you should try some spelling variations:
"johannes dieter muller" » "johannes dietlein muller", "johannes pfister muller", "johannes richter muller", "johannes dietmar muller", "johannes gunter muller", "johannes der muller"
"johannes heiner muller" » "johannes heike muller", "johannes heller muller", "johannes horner muller"
"johannes peter muller" » "johannes beutler muller", "johannes pfister muller", "johannes pantel muller", "johannes peter miller", "johannes peter koller", "johannes geiger muller"
"johann peter muller" » "johann peter miller", "johann peter koller", "johann geiger muller"

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