Perhaps you should try some spelling variations:
"estudios humanos serie." » "estudios urbanos serie.", "estudios peruanos serie.", "estudios humanisticos serie.", "estudios humanas serie.", "estudios humanos desde."
"estudios las especies." » "estudios mas especies.", "estudios a especies.", "estudios laura especies.", "estudios de especies."
"estudio las series." » "estudio la series.", "estudiar las series.", "estudio a series.", "estudio las sedes."

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 las especies.") or ("estudio las series."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("estudios humanos serie.") OR ((("estudios las especies.") OR ("estudio las series."))))*.
• Removing quotes may allow a broader search: (( estudios humanos serie. ) or ((( estudios las especies. ) or ( estudio las series. ))))*.