Perhaps you should try some spelling variations:
"georg friedrich goerdeler" » "glogau friedrich goerdeler" (Expand Search)
"fur friedrich goerdeler" » "rub friedrich goerdeler" (Expand Search), "heer friedrich goerdeler" (Expand Search), "karl friedrich goerdeler" (Expand Search)
"karl dietrich goerdeler" » "kurt dietrich goerdeler" (Expand Search), "karl friedrich goerdeler" (Expand Search), "hans dietrich 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 dietrich goerdeler"))) OR ("georg friedrich goerdeler"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"fur friedrich goerdeler\") OR (\"karl dietrich goerdeler\"))) OR (\"georg friedrich goerdeler\"))".
• Removing quotes may allow a broader search: (((( fur friedrich goerdeler ) OR ( karl dietrich goerdeler ))) OR ( georg friedrich goerdeler )).
• Adding a wildcard symbol may retrieve word variants: (((("fur friedrich goerdeler") OR ("karl dietrich goerdeler"))) OR ("georg friedrich goerdeler"))*.