Thank you for your post.
Pull down the View menu and select "Find Mode". In your Geography field, type in "North South" (this will take care of North America and South America, provided you don't have any other locations with "North" or "South" listed). If you want to omit the other locations (assuming Africa, Asia, etc.), pull down the Requests menu and select "Add New Request". Enter "Africa" into the Geography field and click the "Omit" button in the Status bar. Repeat the same steps for the other locations. When finished, press return, and you will only find those records that have North America and South America in the Geography field.