Perhaps you should try some spelling variations:
"digitalia book collection: lom ediciones." » "digitalia ebook collection: lom ediciones.", "digitalia book collecting: lom ediciones.", "digitalia book collectors: lom ediciones."
"digitalia book collection: las mediaciones." » "digitalia ebook collection: las mediaciones.", "digitalia book collecting: las mediaciones.", "digitalia book collectors: las mediaciones.", "digitalia book collection: las migraciones.", "digitalia book collection: las ecuaciones.", "digitalia book collection: las estaciones."

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