Search Tips: Use boolean expressions. You can use the terms "AND", "OR" and "NOT" to narrow your search. For example, you can search for pages that contain both the words "Nicaragua" and "Volunteer" by entering "Nicaragua AND Volunteer"; find pages containing the word "Jaguar" but exclude references to the cars by searching for "jaguar NOT car"; and, if you are not sure what word might be used, find pages containing either, with a search such as "HMO OR managed care".