tôi thường đi thăm cha mẹ vào những ngày nghỉ lễ. vì tôi học xa nhà, có khi một năm mới gặp mặt một lần nên tôi thường dành thời gian nghỉ lễ để về thăm cha mẹ.
I often visit my parents on holidays. Because I study far away from home, sometimes we only see each other once a year, so I often take time off to visit my parents.
I often visit my parents during holidays. Because I go to school away from home and sometimes only meet once a year, I often use my holidays to visit my parents at home.
I usually visit my parents during holidays. Because I study far away from home, sometimes I meet once a year, so I usually go home on vacation to visit my parents.