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

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: ril editor.") or ("digitalia book collecting: del editor."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia ebook collection: ril editor.") OR ("digitalia book collecting: del editor."))*.
• Removing quotes may allow a broader search: (( digitalia ebook collection: ril editor. ) or ( digitalia book collecting: del editor. ))*.