If using properties and boolean filters seems a little to much for you to handle, you can find files using natural language search (New!), which allows you to perform the same property or boolean search, yet use a form that is easier to use. Instead of kind: document author: (Steve AND Holly), you can type documents by Steve and Holly. Before you can use natural language in a Search box, you need to turn it on under the Search tab in Folder Options in the Control Panel.