Perhaps you should try some spelling variations:
"digitalia ebooks collection: ruiz editor." » "digitalia ebook collection: ruiz editor.", "digitalia book collecting: ruiz editor.", "digitalia ebooks collection: ruiz aitor."
"digitalia book collection: del editor." » "digitalia ebook collection: del editor.", "digitalia book collecting: del editor.", "digitalia book collectors: del editor.", "digitalia book collection: del escritor."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("digitalia book collection: del editor.") or ("digitalia ebooks collection: ruiz editor."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia book collection: del editor.") OR ("digitalia ebooks collection: ruiz editor."))*.
• Removing quotes may allow a broader search: (( digitalia book collection: del editor. ) or ( digitalia ebooks collection: ruiz editor. ))*.