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.

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