Best of all is never to have been born. Second best is to die soon.
Integrating Catfish With Thunar
Catfish is a nice, lightweight, file search GTK application, which can be integrated into Thunar using a custom action.
In Thunar, go to the edit menu and click on Configure custom actions, click the + button and set things up like so:
The second tab needs to be set up too:
Now in Thunar you can right-click on a folder and use search in it.
Catfish Slackbuild: http://slackbuilds.org/repository/14.1/desktop/catfish/