Using Galileo discover with any of these search terms: “Public Speaking, Speech, Oratory or Oral Communication" or specific subjects for your speeches brings up literally thousands of hits.
Note that after you retrieve the initial set of "hits" from your search, which might include literally thousands of titles, the Refine Results column on the left side of the screen contains several methods of further refining what you're looking for in order to reduce the number of articles to a more relevant and manageable result list.
Below are direct links to Galileo databases of particular interest to speech and public speaking students.
Issues and Controversies Explores hundreds of hot topics, giving pro and con viewpoints in politics, government, business, society, education, and popular culture.
The Atlanta Journal Constitution (AJC)
Provides online access to the AJC newspaper from 1990 to the present.
Covers newspaper articles from major national newspapers, such as the New York Times and the Washington Post etc.