Perhaps you should try some spelling variations:
"wieder en siemens ring" » "wieder eine siemens ring" (Expand Search), "wieder von siemens ring" (Expand Search), "wieder _ siemens ring" (Expand Search), "wieder en siemens ringo" (Expand Search), "wieder en siemens ringe" (Expand Search)
"wieder en siemens ging" » "wieder eine siemens ging" (Expand Search), "wieder von siemens ging" (Expand Search), "wieder _ siemens ging" (Expand Search), "wieder en siemens gingo" (Expand Search), "wieder en siemens ginge" (Expand Search)
"wieder en siemens ing" » "wieder eine siemens ing" (Expand Search), "wieder von siemens ing" (Expand Search), "wieder _ siemens ing" (Expand Search), "wieder en siemens ingo" (Expand Search), "wieder en siemens inge" (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: (("wieder en siemens ring") OR ((("wieder en siemens ging") OR ("wieder en siemens ing"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"wieder en siemens ring\") OR (((\"wieder en siemens ging\") OR (\"wieder en siemens ing\"))))".
• Removing quotes may allow a broader search: (( wieder en siemens ring ) OR ((( wieder en siemens ging ) OR ( wieder en siemens ing )))).
• Adding a wildcard symbol may retrieve word variants: (("wieder en siemens ring") OR ((("wieder en siemens ging") OR ("wieder en siemens ing"))))*.