When you search in a database, you need to break your question or topic down into key words. How you put those words together also matters. What the video below for a quick intro to Boolean operators and building effective search strings.
Also check out this search strategy builder from Arizona State University to help you put your keywords together into logical combinations.
Video Length: 1:28
Used with permission from the Ronald Williams Library at Northeastern Illinois University.
Try the search strategy builder to see how to combine your keywords. This tool is not a database and will not run a search, but you can copy and paste the results into a database to run a search.