Perhaps you should try some spelling variations:
"ejercicio publica aspectos metodologicos." » "ejercicio publica aspectos psicologicos.", "servicio publico aspectos metodologicos."
"ejercicio politica aspectos sociologicos." » "ejercicio politica aspectos psicologicos.", "ejercicio politica aspectos economicos.", "ejercito politica aspectos sociologicos.", "ejercito political aspectos sociologicos.", "ejercicio biopolitico aspectos sociologicos.", "ejercicio political aspects sociologicos.", "ejercicio genetica aspectos sociologicos.", "ejercicio fisica aspectos sociologicos."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("ejercicio publica aspectos metodologicos.") or ("ejercicio politica aspectos sociologicos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ejercicio publica aspectos metodologicos.") OR ("ejercicio politica aspectos sociologicos.")).
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• Adding a wildcard symbol may retrieve word variants: (("ejercicio publica aspectos metodologicos.") or ("ejercicio politica aspectos sociologicos."))*.