Perhaps you should try some spelling variations:
"digitalia ebooks collection: con edicion." » "digitalia ebook collection: con edicion.", "digitalia book collecting: con edicion.", "digitalia ebooks collection: con adicion.", "digitalia ebooks collection: canon edicion.", "digitalia ebooks collection: con mediacion."
"digitalia ebooks collection: ocana edicion." » "digitalia ebook collection: ocana edicion.", "digitalia book collecting: ocana edicion.", "digitalia ebooks collection: octava edicion.", "digitalia ebooks collection: lozano edicion.", "digitalia ebooks collection: molina edicion."

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