Perhaps you should try some spelling variations:
presented » presente, present, presentan
presentecion » presentacion, presentacione, apresentacion
presentada » presentado, presentan, presentar, presenteda
presentara » presentar, presentarse, presentadas, presentera
presentaron » presentacion, presentation, presentan, presenteron
presenta » presente

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

• Performing a fuzzy search may retrieve terms with similar spellings: (presented or (((presentecion or presentada) or (presentara OR presentaron)) or presenta))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (presented OR (((presentecion OR presentada) OR (presentara OR presentaron)) OR presenta))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(presented or (((presentecion or presentada) or (presentara OR presentaron)) or presenta))*".