Perhaps you should try some spelling variations:
"serie estudios hispanoos." » "serie estudios hispanicos.", "serie estudios hispano.", "serie estudios espanoles."
"serie estudios hispanic." » "serie estudios hispanicos.", "serie estudios hispano.", "serie studies hispanic."
"serie desafio urbano." » "serie desafio cubano.", "serie espacio 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 desafio urbano.") or ((("serie estudios hispanoos.") or ("serie estudios hispanic."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie desafio urbano.") OR ((("serie estudios hispanoos.") OR ("serie estudios hispanic."))))*.
• Removing quotes may allow a broader search: (( serie desafio urbano. ) or ((( serie estudios hispanoos. ) or ( serie estudios hispanic. ))))*.