What do you want to find them for? You will never be able to avoid hitting them. Most important to know general anatomy of the arteries and then stay away from those.
@kiki That is what I am trying to understand. I totally know I will not miss all veins but if there is anything major I would like to attempt to miss that if possible. And as we are all a little different I know our veins can have branches a little different for each. Have a great day and take care.