Perhaps you should try some spelling variations:
"ciencas sociales. folklore y mitologia." » "ciencias sociales. folklore y mitologia.", "ciencas sociales. folklore y metodologia.", "ciencas sociales. folklore _ mitologia."
"ciencia social. folklore y mitologia." » "ciencias sociales. folklore y mitologia.", "science social. folklore y mitologia.", "asistencia social. folklore y mitologia.", "ciencia social. folklore y metodologia.", "ciencia social. folklore _ mitologia."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("ciencas sociales. folklore y mitologia.") or ("ciencia social. folklore y mitologia."))~.
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