Perhaps you should try some spelling variations:
"karl friedrich goerdeler" » "la friedrich goerdeler" (Expand Search), "halm friedrich goerdeler" (Expand Search), "karl dietrich goerdeler" (Expand Search)
"heer friedrich goerdeler" » "georg friedrich goerdeler" (Expand Search)
"fur friedrich goerdeler" » "rub friedrich goerdeler" (Expand Search), "la friedrich goerdeler" (Expand Search), "_ friedrich goerdeler" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"karl friedrich goerdeler\") OR (((\"fur friedrich goerdeler\") OR (\"heer friedrich goerdeler\"))))~".
• Removing quotes may allow a broader search: (( karl friedrich goerdeler ) OR ((( fur friedrich goerdeler ) OR ( heer friedrich goerdeler ))))~.
• Adding a wildcard symbol may retrieve word variants: (("karl friedrich goerdeler") OR ((("fur friedrich goerdeler") OR ("heer friedrich goerdeler"))))*.