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

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