Perhaps you should try some spelling variations:
"johannes dietlein muller" » "johannes blumlein muller", "johannes detlef muller"
"johannes dieter miller" » "johannes pfister miller", "johannes richter miller", "johannes der miller", "johannes peter miller", "johannes dieter isler", "johannes dietmar 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 dietlein muller") OR ("johannes dieter miller")).
• Removing quotes may allow a broader search: (( johannes dietlein muller ) or ( johannes dieter miller )).
• Adding a wildcard symbol may retrieve word variants: (("johannes dietlein muller") or ("johannes dieter miller"))*.