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