Perhaps you should try some spelling variations:
presented » presente, presenta, presenteed, presentaed
presentan » presenta, presente, presentacion, presentean, presentaan
presentearon » presentaron, presentaran, presenciaron, presenteearon, presentaearon
presentae » presentare, presentase, presente, presenteae, presentaae
presentar » presenta, presentarse, presente, presentear, presentaar
present » presente, presenta

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((presented OR presentan) OR ((presentearon OR (presentae OR presentar)) OR present))~.
• Adding a wildcard symbol may retrieve word variants: ((presented or presentan) or ((presentearon or (presentae or presentar)) or present))*.