Perhaps you should try some spelling variations:
"dos estudios peruanoss." » "dos estudios peruanos.", "dos estudios urbanos.", "los estudios peruanoss."
"serie estudios hispanos." » "serie estudios hispano.", "serie estudios hispanicos.", "serie estudios espanoles."
"artes estudios urbano." » "artes estudios urbanos.", "artes estudio urbano.", "artes estudios peruanos.", "partes estudios urbano.", "arte 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: (((("dos estudios peruanoss.") or ("artes estudios urbano."))) or ("serie estudios hispanos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dos estudios peruanoss.") OR ("artes estudios urbano."))) OR ("serie estudios hispanos."))*.
• Removing quotes may allow a broader search: (((( dos estudios peruanoss. ) or ( artes estudios urbano. ))) or ( serie estudios hispanos. ))*.