Perhaps you should try some spelling variations:
"werner von siemens inge" » "werkes von siemens inge" (Expand Search), "werner von siemens ingo" (Expand Search), "werner von siemens ing" (Expand Search)
"wirken von siemens ging" » "werkes von siemens ging" (Expand Search), "wirken von siemens ing" (Expand Search)
"weiber von siemens fgingo" » "weiber von siemens fingo" (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: (((("werner von siemens inge") OR ("weiber von siemens fgingo"))) OR ("wirken von siemens ging"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"werner von siemens inge\") OR (\"weiber von siemens fgingo\"))) OR (\"wirken von siemens ging\"))".
• Removing quotes may allow a broader search: (((( werner von siemens inge ) OR ( weiber von siemens fgingo ))) OR ( wirken von siemens ging )).
• Adding a wildcard symbol may retrieve word variants: (((("werner von siemens inge") OR ("weiber von siemens fgingo"))) OR ("wirken von siemens ging"))*.