The calculated distance (air line) between Quang Minh and Thái Nguyên is approximately 28 miles respectively 46 kilometers.
By car or train, the actual journey to Thái Nguyên is certainly longer, as only the direct route (as the crow flies) between Quang Minh and Thái Nguyên has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles