In fact, Tanzania itself is a veritable mosaic of ethic and historical diversity. For thousands of years the vast interior saw the endless movement of nomadic tribes migrating from north to south with changing season. While you are busy in this technological era, Bushmen are still busy in hunting and gathering bush fruits. You can imagine how Tanzania has been blessed to have tribes which keep their traditions to date.
I cannot believe that, in this day and age, you are calling these people "bushmen," which is a colonial and derogatory term. Why not call these people by the name or names they use for themselves?