When you want to find articles about topics in your area of interest, use the databases for that subject. Databases are search engines for journal articles, newspaper articles, book reviews, dissertations, and (sometimes) gray literature on specific topics or disciplines.
Most databases are subject- or discipline-specific, but don't forget to try out databases that search across disciplines in order to maximize your ability to find materials. Examples of interdisciplinary databases are Academic Search Premier and JSTOR. Lots of things we'll own online, but for the things we do not own online, make sure to place a request for that item through Resource Sharing.