Perhaps you should try some spelling variations:
"digitalia ebooks collection: con mediacion." » "digitalia ebook collection: con mediacion.", "digitalia book collecting: con mediacion.", "digitalia ebooks collection: como mediacion.", "digitalia ebooks collection: con radiacion.", "digitalia ebooks collection: en mediacion."
"digitalia ebooks collection: co mediacion." » "digitalia ebook collection: co mediacion.", "digitalia book collecting: co mediacion.", "digitalia ebooks collection: o mediacion.", "digitalia ebooks collection: como mediacion.", "digitalia ebooks collection: la mediacion."

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 mediacion.") OR ("digitalia ebooks collection: co mediacion."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"digitalia ebooks collection: con mediacion.\") OR (\"digitalia ebooks collection: co mediacion.\"))".
• Removing quotes may allow a broader search: (( digitalia ebooks collection: con mediacion. ) OR ( digitalia ebooks collection: co mediacion. )).
• Adding a wildcard symbol may retrieve word variants: (("digitalia ebooks collection: con mediacion.") OR ("digitalia ebooks collection: co mediacion."))*.