Perhaps you should try some spelling variations:
"socio antropologias y etnologia." » "socio antropologica y etnologia.", "serie antropologia y etnologia.", "bio antropologia y etnologia.", "socio antropologia y etnologia.", "socio antropologia e etnologia.", "socio antropologico y etnologia.", "socio antropologias y ecologia."
"social anthropology la biologia." » "medical anthropology la biologia.", "visual anthropology la biologia.", "political anthropology la biologia.", "social anthropology _ biologia.", "social antropologo la biologia.", "social anthropology latin biologia.", "social anthropology la sociologia."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("socio antropologias y etnologia.") or ("social anthropology la biologia."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("socio antropologias y etnologia.") OR ("social anthropology la biologia.")).
• Removing quotes may allow a broader search: (( socio antropologias y etnologia. ) or ( social anthropology la biologia. )).
• Adding a wildcard symbol may retrieve word variants: (("socio antropologias y etnologia.") or ("social anthropology la biologia."))*.