Perhaps you should try some spelling variations:
"serie estudios peruanoss." » "serie estudios peruanos."
"serie estudios urbano." » "serie estudio urbano.", "serie estudios peruanos.", "serie estudios hispano."
"seis estudios urbanos." » "seis estudio urbanos.", "seis estudios peruanoss.", "seis estudios hispanos.", "los estudios urbanos.", "dos estudios urbanos.", "dios estudios urbanos."

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 peruanoss.") or ("serie estudios urbano."))) or ("seis estudios urbanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie estudios peruanoss.") OR ("serie estudios urbano."))) OR ("seis estudios urbanos."))*.
• Removing quotes may allow a broader search: (((( serie estudios peruanoss. ) or ( serie estudios urbano. ))) or ( seis estudios urbanos. ))*.