There are several places to look:
Vital Speeches of the Day publishes important public speeches and addresses from prominent figures.
To search though it, click the blue Search within this publication link at the top left of the page.
Enter your keyword in the empty search box under the top search box that shows the text "JN Vital Speeches of the Day".
For more related resources, try looking through the Speech databases.
For books, use the Library Catalog, select "subject" from the drop down box then enter "Speeches addresses". Some of the books have collections of speeches while others have speeches from a single prominent person.
If you need research help, Contact Us with additional questions.