Perhaps you should try some spelling variations:
"johannes dieter muller" » "johannes dietlein muller", "johannes pfister muller", "johannes richter muller", "johannes peter muller", "johannes gunter muller", "johannes der muller"
"johannes peter miller" » "johann peter miller", "johannes beutler miller", "johannes pfister miller", "johannes peter muller", "johannes peter koller", "johannes feuer miller"

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 miller")).
• Removing quotes may allow a broader search: (( johannes dieter muller ) or ( johannes peter miller )).
• Adding a wildcard symbol may retrieve word variants: (("johannes dieter muller") or ("johannes peter miller"))*.