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