Yes you can track a USPS money order in a few different ways.
One way to track the Status of your USPS money order is through the USPS website and the money order serial number.
To track a USPS money order online go to this URL https://mois.usps.com/pls/pmoisnp/mois_external_pkg.main
On that money order tracking page enter the money orders serial number to track the money order.
Another way of tracking a USPS money order is to go to your post office and fill out a form PS Form 6401 which is a Money Order Inquiry Form.