Perhaps you should try some spelling variations:
"digitalia ebooks collection: ruiz editor." » "digitalia book collecting: ruiz editor.", "digitalia ebooks collection: ruiz aitor.", "digitalia books collection: ruiz editor."
"digitalia ebook collection: al editor." » "digitalia ebook collection: akal editor.", "digitalia ebook collection: del editor.", "digitalia ebook collection: al exito.", "digitalia book collection: al editor."

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