Vietnam Veterans Liver Fluke Cancer Study Act This bill requires the Department of Veterans Affairs (VA) to conduct an epidemiological study and report on the prevalence of cholangiocarcinoma (bile duct cancer) in veterans who served in the Vietnam theater of operations during the Vietnam era. The study shall identify the rate of incidence of cholangiocarcinoma in such veterans and in U.S. residents. The bill also requires the VA to track and report on the prevalence of cholangiocarcinoma using the Veterans Affairs Central Cancer Registry.