Perhaps you should try some spelling variations:
"digitalia ebooks collection: del escritor." » "digitalia ebook collection: del escritor.", "digitalia book collecting: del escritor.", "digitalia ebooks collection: un escritor."
"digitalia book collection: del escritor." » "digitalia ebook collection: del escritor.", "digitalia book collecting: del escritor.", "digitalia book collectors: del escritor.", "digitalia book collection: un escritor."

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: (("digitalia ebooks collection: del escritor.") or ("digitalia book collection: del escritor."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia ebooks collection: del escritor.") OR ("digitalia book collection: del escritor.")).
• Removing quotes may allow a broader search: (( digitalia ebooks collection: del escritor. ) or ( digitalia book collection: del escritor. )).
• Adding a wildcard symbol may retrieve word variants: (("digitalia ebooks collection: del escritor.") or ("digitalia book collection: del escritor."))*.