Perhaps you should try some spelling variations:
"digitalia ebooks collection: con radiacion." » "digitalia book collecting: con radiacion.", "digitalia ebooks collection: con adicion.", "digitalia ebooks collection: con mediacion.", "digitalia ebooks collection: por radiacion.", "digitalia books collection: con radiacion."
"digitalia ebook collection: con edicion." » "digitalia ebook collection: con adicion.", "digitalia ebook collection: canon edicion.", "digitalia ebook collection: con mediacion.", "digitalia book collection: con 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 ebook collection: con edicion.") or ("digitalia ebooks collection: con radiacion."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia ebook collection: con edicion.") OR ("digitalia ebooks collection: con radiacion.")).
• Removing quotes may allow a broader search: (( digitalia ebook collection: con edicion. ) or ( digitalia ebooks collection: con radiacion. )).
• Adding a wildcard symbol may retrieve word variants: (("digitalia ebook collection: con edicion.") or ("digitalia ebooks collection: con radiacion."))*.