The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "serves" appeared
2015-11-04 : One year of ECB Banking Supervision2015-02-24 : Unveiling of the new €20 banknote
2013-06-18 : Opening remarks at the session “Rethinking the Limitations of Monetary Policy”
2012-10-09 : Hearing at the Committee on Economic and Monetary Affairs of the European Parliament