Translation:Why do you not come here?
A sentence that is very useful in and of itself :) thank you
In English it would be perfectly fine to say "Why don't you come here?" The only awkwardness come in saying, "Why do you not come here?" instead of using the contraction.
why are you not coming here, not accepted, reported and seems more natural.
It is accepted now
In English, "why not come here" would be perfectly fine.