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: co mediacion.", "digitalia ebooks collection: como mediacion.", "digitalia ebooks collection: con radiacion."
"digitalia book collectors: lom edicion." » "digitalia book collecting: lom edicion.", "digitalia ebook collection: lom edicion.", "digitalia ebook collectors: lom edicion.", "digitalia book collectors: lom ediciones.", "digitalia book collectors: la edicion.", "digitalia book collectors: con edicion."

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 book collectors: lom edicion."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia ebooks collection: con mediacion.") OR ("digitalia book collectors: lom edicion."))*.
• Removing quotes may allow a broader search: (( digitalia ebooks collection: con mediacion. ) or ( digitalia book collectors: lom edicion. ))*.