Perhaps you should try some spelling variations:
presented » presente, present, presentan
presentada » presentado, presentan, presentar, presenteda
presentaba » presentara, presentadas, presentaran, presenteba
presentaban » presentaran, presentadasn, presentarann, presentan, presentaron, presentadas, presenteban
presentacion » presentecion
presenta » presente

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 (((presentacion OR presentada) OR (presentaba OR presentaban)) OR presenta))~.
• Adding a wildcard symbol may retrieve word variants: (presented or (((presentacion or presentada) or (presentaba or presentaban)) or presenta))*.