When you want to say "Good bye" in Kazakhstan, you could say,
Сау болыңыз.
Saw bolıñız.
Good bye.
This is a formal way to say "Good bye".
When you want to say "Good bye" to your friends, you also say,
Саубол
Sawbol
Bye bye
Also, when you know you will meet them again, you could say,
Кездескенше.
Kezdeskenşe.
See you.