1. In The Raiser's Edge, select Records > Constituents
2. Click on the binoculars to search for a record. 
3. With the Search window open, at the bottom of the window, Mark the "Use Enhanced Search" checkbox. 

OR

1. In The Raiser's Edge, select Records > Constituents
2. Click on the binoculars to search for a record. 
3. In the Search using query field dropdown, select Default.