Perhaps you should try some spelling variations:
"digitalia coin collections: con adicion." » "digitalia _ collections: con adicion.", "digitalia art collections: con adicion.", "digitalia law collections: con adicion.", "digitales con collections: con adicion.", "digital con collections: con adicion.", "digitalia poesia collections: con adicion."
"digitalia ebook collection: lom edicion." » "digitalia ebook collection: lom ediciones.", "digitalia ebook collection: la edicion.", "digitalia ebook collection: con edicion.", "digitalia ebooks collection: lom edicion.", "digitalia book collection: lom edicion."

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