Hello,
Can I short circuit ground and neutral wire, my village house does not have regular ground, I have a three phase star system, is it safe?
Not enough information given, but probably no.
Firstly you need to be qualified by the authority having jurisdiction in your area to alter your electrical system. Contrary to popular belief, grounding is the most important part of an electrical system.
Getting it wrong could be fatal. Even driving your own ground rod is illadvised because it needs to connect to the grounding system properly or something shorting out to ground may not trip the circuit breaker properly.
Usually wye configurations have the neutral (transformer X0 term) grounded to earth through a grounding electrode system and the neutral and equipment ground are bonded together at the main service panel, inside the meter can, or lateral wires from the utility company.
To confuse maters more, other parts of the house need to be bonded to the grounding system but are not grounding electrodes.
Sage advice was given by those who recommend hiring an electrician.
Another no,no, is simply trying a ground pin to the neural pin of an outlet. (Bootleg ground) it causes parallel current paths causing overheating of wires, and connects the current carrying neutral to the casing of an appliance.
So yes, do yourself a favor and consult an electrician.