Hi, welcome to iPF!
If it's not an app that you're looking at at the moment when you see something "searching", then take a look at the multitask bar. To view it, double tap the Home button. Most of the apps there will not be active, just waiting for you to open them again. You can try, however, force closing them and watching the effect on your iPad.
To force close apps:
iOS 6: tap and hold one of the apps in multitask bar until they start to wiggle. Delete them.
iOS 7: slide the pictures/thumbnails above the app icons towards the top of the screen.
Hope that helps.