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

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