We always suggest starting with a library database: an EBSCO database like Academic Search Premier, or the library's Google-esque tool, JaySearch.
Depending on your specific topic, these are some of the most relevant search terms and phrases. (Note: to search something as a phrase, surround the terms in double quotations, like this: "welfare state" or "privacy violations")
Remember different databases will use different terminologies.
Some aspects of consumer marketing research involve some of these terms: