The calculated distance (air line) between Tuyên Quang and Chí Linh is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to Chí Linh is certainly longer, as only the direct route (as the crow flies) between Tuyên Quang and Chí Linh has been calculated here.
Air line (approximately)
142 kilometers
77 nautical miles