Perhaps you should try some spelling variations:
"estudios humanos desde." » "estudios peruanos desde.", "estudios humanisticos desde.", "estudios ensayos desde.", "estudios humanos de."
"estudios urbanos desde." » "estudios urbano desde.", "estudios urbana desde.", "estudios cubanos desde."
"estudios marcial serie." » "estudios marti serie.", "estudios social 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 humanos desde.") OR ("estudios urbanos desde."))) or ("estudios marcial serie."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("estudios humanos desde.") OR ("estudios urbanos desde."))) OR ("estudios marcial serie."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"estudios humanos desde.\") OR (\"estudios urbanos desde.\"))) or (\"estudios marcial serie.\"))*".
• Removing quotes may allow a broader search: (((( estudios humanos desde. ) OR ( estudios urbanos desde. ))) or ( estudios marcial serie. ))*.