I'm a 21 years old girl, college student and my height is just146cm. I'm look so short its make me feel embrasing. What I must do to grow taller?

Too late to grow. A woman stops growing a short time after she starts her menses. At 21 years old you are well past that point. Focus on maximizing your health by eating natural foods and developing a good exercise program. A healthy and fit person is always appealing and those are characteristics that will stand out more than height.