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