Perhaps you should try some spelling variations:
"estudio de la ocde sobre governance public" » "estudio de la ocde sobre governance policy", "estudio de la ocde sobre gouvernance publique", "estudio de la ocde sobre government public", "estudio de la ocde sobre governanca public", "estudio de la ocde core governance public", "estudio de la ocde store governance public"
"estudio de la ocde some governance public" » "estudio de la ocde some governance policy", "estudio de la ocde some gouvernance publique", "estudio de la ocde some government public", "estudio de la ocde space governance public", "estudio de la ocde crime governance public", "estudio de la ocde e governance public", "estudio de la oxide some governance public", "estudio de la made some governance public", "estudio de la code some governance public"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudio de la ocde sobre governance public\") OR (\"estudio de la ocde some governance public\"))".
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• Adding a wildcard symbol may retrieve word variants: (("estudio de la ocde sobre governance public") OR ("estudio de la ocde some governance public"))*.