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

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