Start with what you know - keywords: Nuclear Proliferation Debate
Review the list of results, a few things will jump out as you go through the results
Once you've found an interesting title, click on it to view more details - for example: search for Nuclear Proliferation Debate
This view is the called the brief view for the title, but if you click on the title link you can see the detailed view of the item. This has several important features that can help you advance your research.