Perhaps you should try some spelling variations:
"estudios humanidades serie." » "estudios humanisticos serie.", "estudios humanidades tec.", "estudios humanidades en.", "estudios humanidades temas."
"estudios humanos serie." » "estudios urbanos serie.", "estudios peruanos serie.", "estudios humanisticos serie.", "estudios humanas serie."
"estudios humanos desde." » "estudios urbanos desde.", "estudios peruanos desde.", "estudios humanisticos desde.", "estudios humanos de."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("estudios humanos serie.") or ("estudios humanos desde."))) or ("estudios humanidades serie."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios humanos serie.") OR ("estudios humanos desde."))) OR ("estudios humanidades serie.")).
• Removing quotes may allow a broader search: (((( estudios humanos serie. ) or ( estudios humanos desde. ))) or ( estudios humanidades serie. )).
• Adding a wildcard symbol may retrieve word variants: (((("estudios humanos serie.") or ("estudios humanos desde."))) or ("estudios humanidades serie."))*.