Perhaps you should try some spelling variations:
"estudios humanos desde." » "estudios urbanos desde.", "estudios peruanos desde.", "estudios humanisticos desde.", "estudios humanos de."
"estudios mas serie." » "estudios maior serie.", "estudios de serie.", "estudios en serie.", "estudios mazas serie.", "estudios las series.", "estudios mayo serie."
"estudios a serie." » "estudios e serie.", "estudios d serie.", "estudios _ serie.", "estudios la serie.", "estudios i serie.", "estudios 2 serie."

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 desde.") or ((("estudios mas serie.") OR ("estudios a serie."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("estudios humanos desde.") OR ((("estudios mas serie.") OR ("estudios a serie.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudios humanos desde.\") or (((\"estudios mas serie.\") OR (\"estudios a serie.\"))))".
• Removing quotes may allow a broader search: (( estudios humanos desde. ) or ((( estudios mas serie. ) OR ( estudios a serie. )))).
• Adding a wildcard symbol may retrieve word variants: (("estudios humanos desde.") or ((("estudios mas serie.") OR ("estudios a serie."))))*.