Google Scholar is a great way to search for academic articles across multiple disciplines. Change the preferences on your Google Scholar page to link to Foley Library's full-text holdings.
Use a site: search to search a particular website or Top-level Domain (TLD). For example, searching site:www.gonzaga.edu leadership will only return results containing leadership from www.gonzaga.edu. Additionally, searching site:.org communication will only return results containing communication from .org websites.