Perhaps you should try some spelling variations:
"digitalia book collection: edicion david." » "digitalia ebook collection: edicion david.", "digitalia book collecting: edicion david.", "digitalia book collectors: edicion david.", "digitalia book collection: ediciones david.", "digitalia book collection: religion david.", "digitalia book collection: edicion edad."
"digitalia book collection: educacion edad." » "digitalia ebook collection: educacion edad.", "digitalia book collecting: educacion edad.", "digitalia book collectors: educacion edad.", "digitalia book collection: educacion en.", "digitalia book collection: educacion a.", "digitalia book collection: educacion el."

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 book collection: edicion david.") or ("digitalia book collection: educacion edad."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia book collection: edicion david.") OR ("digitalia book collection: educacion edad.")).
• Removing quotes may allow a broader search: (( digitalia book collection: edicion david. ) or ( digitalia book collection: educacion edad. )).
• Adding a wildcard symbol may retrieve word variants: (("digitalia book collection: edicion david.") or ("digitalia book collection: educacion edad."))*.