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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("las ciencies socials. tercera decada.") or ("las ciencia social. tercera decada."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("las ciencies socials. tercera decada.") OR ("las ciencia social. tercera decada.")).
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• Adding a wildcard symbol may retrieve word variants: (("las ciencies socials. tercera decada.") or ("las ciencia social. tercera decada."))*.