Perhaps you should try some spelling variations:
"tres estudioss urbano." » "tres estudios urbano.", "tres estudios urbanos.", "tres estadios urbano.", "otros estudios urbano."
"series estudios hispano." » "serie estudios hispano.", "seis estudios hispano.", "tres estudios hispano.", "series estudios hispana.", "series estudios hispanic."
"serie estudio urbano." » "serie estudios urbano.", "serie estudios urbanos.", "serie espacio urbano.", "serie studia urbano.", "serie estado 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: (((("tres estudioss urbano.") or ("serie estudio urbano."))) or ("series estudios hispano."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tres estudioss urbano.") OR ("serie estudio urbano."))) OR ("series estudios hispano.")).
• Removing quotes may allow a broader search: (((( tres estudioss urbano. ) or ( serie estudio urbano. ))) or ( series estudios hispano. )).
• Adding a wildcard symbol may retrieve word variants: (((("tres estudioss urbano.") or ("serie estudio urbano."))) or ("series estudios hispano."))*.