How do I find/buy wheel covers that are screwed on?

I have a mini van and have lost the wheel covers so many times. I am trying to find out if I can get wheel covers that are attached to the wheel somehow and dont constantly fly off and break. I dont know where to begin and what exactly to ask for. 1998 Plymouth Voyager Expresso Work vehicle that needs to look nice and the wheels are the only thing I cant keep up to. Do they make wheel covers that attach and dont come off?