Perhaps you should try some spelling variations:
presented » presente, presenta, presenteed, presentaed
presentan » presenta, presente, presentean, presentaan
presentada » presentado, presenta, presentar, presenteada, presentaada
presentara » presentar, presentarse, presentaron, presenteara, presentaara
presentacion » presenteacion, presentaacion
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 presentada) OR (presentara OR presentacion)) OR present))~.
• Adding a wildcard symbol may retrieve word variants: (presented or (((presentan or presentada) or (presentara or presentacion)) or present))*.