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