You can combine your search terms to create several potential search strategies to find relevant results. For phrases, use " " or ( ) to keep words together & in order.
Search Example 1: children AND violence AND "video games"
Search Example 2: youth AND gaming AND "aggressive behavior"
Search Example 3: kids AND "computer games" AND "aggressive behavior" OR "antisocial behavior"
Search Example 4: (youth OR children) AND (gaming OR "video games") AND violence
Combining keywords using AND, OR, & NOT is called Boolean searching.