The calculated distance (air line) between Phủ Lý and Thái Nguyên is approximately 73 miles respectively 117 kilometers.
By car or train, the actual journey to Thái Nguyên is certainly longer, as only the direct route (as the crow flies) between Phủ Lý and Thái Nguyên has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles