Does Buddhism teach about "Parallel worlds"

I have heard something called "Mangala Sakwala" (The special universe or galaxy where lord Buddhas are born) This is a real puzzle for me because does it mean that there are many other worlds like this where the words of lord Buddha will never reach? If such places exist what causes a being to be born there instead of here? For example if i die now and get a birth as a human what would cause me to be born here (This galaxy/universe) or there (the unknown galaxy/universe)? The exact word ( "parallel universes" ) hasn't being used in Buddhism but if you search you will find stories about Human like or Humanoid creatures who are just like us (Beings in the human realm) but not with the chance to reach Dhamma because Lord Buddhas never born there. I am referring to some Theravada teachings i heard many years ago. Hope someone can help!