Perhaps you should try some spelling variations:
"digitalia ebooks collection: con edicion." » "digitalia book collecting: con edicion.", "digitalia ebooks collection: con adicion.", "digitalia ebooks collection: canon edicion.", "digitalia ebooks collection: con mediacion.", "digitalia books collection: con edicion."
"digitalia ebook collection: lom ediciones." » "digitalia book collection: lom ediciones."

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