Even when you are a full time employee in a company, you are NOT guaranteed a bonus. In fact you may NOT even get your full salary simply because your salary consist of a variable wage component and your boss can easily reduce the VWC based on the excuse that business is no good.
Having said that, do you seriously think a conscript who is paid an allowance (NOT a salary) would get a bonus?
I recall there was a guy in my section who would work as banquet casual labour during the weekends to earn extra cash. That is what you should consider doing if your parents really have financial burdens. That would be more productive than complaining here.