This video will show you how to formulate keywords for your inquiry question, which will help you find sources for your topic.
You'll sometimes find that an initial search for one of your keywords in the databases may not yield any results, or results that are not relevant to your topic. This is why it's a good idea to brainstorm other words that could be used to describe your topic. Some examples:
teenager ► adolescent OR young adult
police ► law enforcement OR cops
protest ► activism OR social movements