Perhaps you should try some spelling variations:
"estudios humanisticas de." » "estudios humanisticos de.", "estudios mecanisticos de.", "estudios feministas de.", "estudios humanistica de.", "estudios humanistas de.", "estudios humanisticas en."
"estudios urbanos serie." » "estudios humanos serie."
"estudios a serie." » "estudios e serie.", "estudios d serie.", "estudios _ serie.", "estudios la serie.", "estudios i serie.", "estudios 2 serie."

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

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