The calculated distance (air line) between Xam Nua and Thái Nguyên is approximately 142 miles respectively 228 kilometers.
By car or train, the actual journey to Thái Nguyên is certainly longer, as only the direct route (as the crow flies) between Xam Nua and Thái Nguyên has been calculated here.
Air line (approximately)
228 kilometers
123 nautical miles