Perhaps you should try some spelling variations:
"digitalia book collection: del escritor." » "digitalia ebook collection: del escritor.", "digitalia book collecting: del escritor.", "digitalia coin collections: del escritor.", "digitalia book collection: un escritor."
"digitalia book collectors: del editor." » "digitalia book collecting: del editor.", "digitalia ebook collection: del editor.", "digitalia ebook collectors: del 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 book collectors: del editor.") or ("digitalia book collection: del escritor."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia book collectors: del editor.") OR ("digitalia book collection: del escritor."))*.
• Removing quotes may allow a broader search: (( digitalia book collectors: del editor. ) or ( digitalia book collection: del escritor. ))*.