Content Groups Dialog Box
Use this dialog box to add the desired content groups from the Content Database. Under Content Database, select the desired content group, and then click OK. You can select multiple content groups by holding down the SHIFT key or the CTRL key while clicking them. To view information about a content group, select the desired group, and then click View Group.
The content groups you added appear in the Criteria column in the Add Complex group dialog box. Each content group you add is treated as a single filter criterion that can be included in your Boolean expression.