Perhaps you should try some spelling variations:
presented » presente, presentan, presenteed
present » presente
presentacion » presenteacion, presentecion
presentadas » presenteadas, presentada, presentedas
presentado » presenteado, presentan, presentar, presentedo
presentaba » presenteaba, presentaban, presentada, presentara, presenteba
presenta » presentea, 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 present) or (((presentacion or (presentadas OR presentado)) or presentaba) or presenta))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((presented OR present) OR (((presentacion OR (presentadas OR presentado)) OR presentaba) OR presenta))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((presented or present) or (((presentacion or (presentadas OR presentado)) or presentaba) or presenta))*".