Perhaps you should try some spelling variations:
"las ciencies socials. tercera decada." » "las ciencias sociales. tercera decada.", "las ciencia social. tercera decada.", "las ciencas sociales. tercera decada.", "las ciencias socials. tercera decada.", "les ciencies socials. tercera decada.", "las ciencas socials. tercera decada."
"la asistencia social. tercera decada." » "la resistencia social. tercera decada.", "la existencia social. tercera decada."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("la asistencia social. tercera decada.") or ("las ciencies socials. tercera decada."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("la asistencia social. tercera decada.") OR ("las ciencies socials. tercera decada."))*.
• Removing quotes may allow a broader search: (( la asistencia social. tercera decada. ) or ( las ciencies socials. tercera decada. ))*.