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