Perhaps you should try some spelling variations:
"las ciencias sociais. tercera decada." » "las ciencias sociales. tercera decada.", "las ciencia social. tercera decada.", "las ciencas sociales. tercera decada."
"las ciencies socials. tercera decada." » "las ciencias sociales. tercera decada.", "las ciencia social. tercera decada.", "las ciencas sociales. tercera decada.", "les ciencies socials. tercera decada.", "las ciencas socials. tercera decada.", "las creencias socials. tercera decada."

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: (("las ciencias sociais. tercera decada.") or ("las ciencies socials. tercera decada."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("las ciencias sociais. tercera decada.") OR ("las ciencies socials. tercera decada.")).
• Removing quotes may allow a broader search: (( las ciencias sociais. tercera decada. ) or ( las ciencies socials. tercera decada. )).
• Adding a wildcard symbol may retrieve word variants: (("las ciencias sociais. tercera decada.") or ("las ciencies socials. tercera decada."))*.