Perhaps you should try some spelling variations:
"series estudioss urbano." » "serie estudios urbano.", "seis estudios urbano.", "serie estudio urbano.", "series estudios urbano.", "series estudios urbanos.", "series estudio urbano.", "serie estudioss urbano.", "seis estudioss urbano.", "tres estudioss urbano."
"series estudios hispano." » "serie estudios hispano.", "seis estudios hispano.", "tres estudios hispano.", "series estudios hispana.", "series estudios hispanic."
"serie espacio urbano." » "serie espacio urbanismo.", "serie desafio urbano.", "serie estado urbano.", "serie estudio urbano."

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: (((("series estudioss urbano.") or ("serie espacio urbano."))) or ("series estudios hispano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("series estudioss urbano.") OR ("serie espacio urbano."))) OR ("series estudios hispano.")).
• Removing quotes may allow a broader search: (((( series estudioss urbano. ) or ( serie espacio urbano. ))) or ( series estudios hispano. )).
• Adding a wildcard symbol may retrieve word variants: (((("series estudioss urbano.") or ("serie espacio urbano."))) or ("series estudios hispano."))*.