The webapp provides for each item the link on ECB's website.
Speeches for : Benoit Coure where "credibility" appeared
2019-12-18 : Monetary policy: lifting the veil of effectiveness2017-05-18 : Interview with Reuters
2015-01-13 : Interview with Die Welt
2014-04-07 : Interview with Le Figaro
2013-05-17 : Monetary policy in the crisis - Confronting short-run challenges while anchoring long-run expectations