If your Tinder app is not finding anyone, then I'd recommend changing your settings to something less restrictive.
Try a larger radius, or maybe even consider a wider age-group so that people in your area aren't getting filtered out...
If nothing is working, then a last resort would be to delete the app and reinstall it. You may also want to drop Tinder a line to let them know that you'e having problems.
You can reach them on the Twitter support account at: https://twitter.com/TinderSupport