Perhaps you should try some spelling variations:
bernhard buehler » bernhard fuehrer, bernhard muhler, bernhard muhlherr
bernhard becker » bernhard peter, bernhard fischer, bernhard fuehrer
bernhard heck » bernhard heiko, bernhard h.c, bernhard herz

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: ((bernhard heck) OR (((bernhard buehler) OR (bernhard becker)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bernhard heck) or (((bernhard buehler) OR (bernhard becker))))".
• Adding a wildcard symbol may retrieve word variants: ((bernhard heck) or (((bernhard buehler) OR (bernhard becker))))*.