Chalta hai: it goes, it will do. The Rekhta dictionary gives “it works! it meets the need.” For sab chalta hai, everything goes, it adds: “usu. uttered when something substandard or wrong is approved of.”
Jaane do: let it go. Rekhta gives “never mind, let go of it, let it be, overlook it, forgive (him/her).”
Mitti pao: just leave it. Rekhta refers the reader to the form mitti dalo. Mitti is earth.