A part of my student's life

I am studying in Auditing as a student of National Economic University. I am at second year of university so that I am not actually clear about what I am learning about. Everyday is the same in my student's life. Going to class and back home after lectures at school. Beside, I have siblings: an older brother and older sister so that I am the last one. It is such a difiulty for my parents to grow us up until we are stable. Especially now, when three of us are in university so the money my parents give us just enough for basic necessary such as food, books... I need more money on buying clothes, mystics,.... that why I seek a new job as a tutor. I seem very lucky cause i could get it very quickly, I earn 1.2 million dong per month. I feel not enough, i continued seeking another job and I found it, a sale assistant in a clothes for women shop. My salary is average 2 million per month. So in total I earn 3 million per month. But I do not use all of them, I just use one thirds and the remainder iI economize for registering a ielts course. My money is 10 million dong now, I have my mom keep that money for me, I worry that if I keep I will spend all of them in just 1 minute.