Chúng ta is inclusive, chúng tôi is exclusive or neutral and chúng mình/tao is exclusive..
Does inclusive/exclusive refer to whether the second person is being referred to along with the first person? For example, "We [my sister and I] drink water" -> "Chúng mình ([or "chúng tao" or even "chúng tôi"]) uống nước." But "We [you and I] drink water" -> "Chúng ta uống nước." If not, what does inclusive/exclusive mean?