The Library Quick Search is not the only place to find information. General multidisciplinary databases like Academic Search Premier and ProQuest Research contain scholarly articles, trade magazines, and other materials on a wide range of topics and can be a good way to see what sources are out there.
Subject databases are collections of scholarly articles, book chapters, reviews, and other information sources that have been selected by experts. Use them to find high-quality, in-depth information on specific topics. Below is a list of good places to start depending on your topic. Be aware that aspects of your topic might fall under more than one discipline. The full list of databases can be found here.