Perhaps you should try some spelling variations:
"series estudioss urbano." » "series estudios urbano.", "serie estudios urbano.", "seis estudios urbano.", "series estudios urbanos.", "series estudio urbano."
"tres estudios hispana." » "tres estudios hispano.", "tres estudios hispanicos.", "tres estudios historia.", "otros estudios hispana.", "los estudios hispana.", "dos estudios hispana."
"serie desafio cubano." » "serie desafio susana.", "serie desafio ciudadano."

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

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