Perhaps you should try some spelling variations:
"texts zur popularen musik" » "texts zur populare musik", "texts der popularen musik", "texts des popularen musik", "texts war popularen musik", "texts more popularen musik", "texts der populareen musik", "texte zur popularen musik", "texte zu popularen musik", "text zu popularen musik"
"texts zur popular music" » "texts war popular music", "texts more popular music", "texts der populare music", "texte zur popular music", "texte zu popular music", "text zu popular music"
"text zum popular music" » "text from popular music", "text zum formular music", "text im popular music"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("texts zur popularen musik") or ((("texts zur popular music") OR ("text zum popular music"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("texts zur popularen musik") OR ((("texts zur popular music") OR ("text zum popular music")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"texts zur popularen musik\") or (((\"texts zur popular music\") OR (\"text zum popular music\"))))".
• Removing quotes may allow a broader search: (( texts zur popularen musik ) or ((( texts zur popular music ) OR ( text zum popular music )))).
• Adding a wildcard symbol may retrieve word variants: (("texts zur popularen musik") or ((("texts zur popular music") OR ("text zum popular music"))))*.