Perhaps you should try some spelling variations:
popularen music » popular music, populare musik
"texts zur popularen musik" » "texts zur populare musik", "texts zur popular music", "texts der popularen musik", "texts des popularen musik", "texte zur popularen musik", "texte zu popularen musik", "text zu popularen musik"
zum popularen » im popularen, des popularen, der popularen
"text zum populären music" » "text im populären 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 ("text zum populären music"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("texts zur popularen musik") OR ("text zum populären music")).
• Removing quotes may allow a broader search: (( texts zur popularen musik ) or ( text zum populären music )).
• Adding a wildcard symbol may retrieve word variants: (("texts zur popularen musik") or ("text zum populären music"))*.