Perhaps you should try some spelling variations:
"serie estudios peruanos." » "serie estudios americanos.", "serie estudios ensayos.", "serie estudios cervantinos."
"series estudios urbanos." » "seis estudios urbanos.", "tres estudios urbanos.", "leyes estudios urbanos."
"series estudios hispano." » "seis estudios hispano.", "tres estudios hispano.", "leyes estudios hispano."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("series estudios urbanos.") or ((("series estudios hispano.") or ("serie estudios peruanos."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("series estudios urbanos.") OR ((("series estudios hispano.") OR ("serie estudios peruanos."))))*.
• Removing quotes may allow a broader search: (( series estudios urbanos. ) or ((( series estudios hispano. ) or ( serie estudios peruanos. ))))*.