I am 20 years old and my hieght is 176.5cm can i get 0.5 cm more hieght at this age?

As a 20 year old male, your growth is likely done and your bones growth plates closed. There are no supplements or hormones you could take that are going to make a difference at this point in time. You need to accept where you are at and get on with living your life at your current stature. You show your stature by what you do in life, not by your height.