The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "credible" appeared
2016-10-07 : IMFC Statement2015-03-16 : Speech by the President at SZ Finance Day 2015
2012-12-07 : A central banker's perspective on European economic convergence
2012-11-15 : The monetary policy of the European Central Bank and its transmission in the euro area
2012-10-24 : Opening statement at Deutscher Bundestag
2011-12-01 : Hearing before the Plenary of the European Parliament on the occasion of the adoption of the Resolution on the ECB's 2010 Annual Report