Perhaps you should try some spelling variations:
"freiheit vor siemens ging" » "freiheit floh siemens ging" (Expand Search), "freiherr von siemens ging" (Expand Search), "freiheit die siemens ging" (Expand Search), "freiheit vor siemens ing" (Expand Search)
"weber von siemens ging" » "weiber von siemens ging" (Expand Search), "wieder von siemens ging" (Expand Search), "leben von siemens ging" (Expand Search), "weber von siemens ing" (Expand Search)
"retter von siemens ging" » "retter von siemens ing" (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: "((((\"weber von siemens ging\") OR (\"freiheit vor siemens ging\"))) OR (\"retter von siemens ging\"))~".
• Removing quotes may allow a broader search: (((( weber von siemens ging ) OR ( freiheit vor siemens ging ))) OR ( retter von siemens ging ))~.
• Adding a wildcard symbol may retrieve word variants: (((("weber von siemens ging") OR ("freiheit vor siemens ging"))) OR ("retter von siemens ging"))*.