Perhaps you should try some spelling variations:
"digitalia ebooks collection: lom ediciones." » "digitalia ebook collection: lom ediciones.", "digitalia book collecting: lom ediciones."
"digitales la collections: con mediacion." » "digitales law collections: con mediacion.", "digitales _ collections: con mediacion.", "digitales a collection: con mediacion.", "digitales la collections: co mediacion.", "digitales la collections: como mediacion.", "digitales la collections: con radiacion.", "digitales a collections: con mediacion.", "digitales una collections: con mediacion.", "digitales en collections: con mediacion."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("digitalia ebooks collection: lom ediciones.") or ("digitales la collections: con mediacion."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digitalia ebooks collection: lom ediciones.") OR ("digitales la collections: con mediacion."))*.
• Removing quotes may allow a broader search: (( digitalia ebooks collection: lom ediciones. ) or ( digitales la collections: con mediacion. ))*.