We do not want to do business with you. ☊ 
Chúng tôi không muốn làm ăn với bạn. ☊ Informal Expressions They used to do business in China and Japan. ☊ Họ đã từng làm ăn ở Trung Quốc và Nhật. ☊ Informal Expressions like: to do business → →
It's been a pleasure to do business with you. ☊ business ☊
They like to do business by phone/over the phone. ☊ phone ☊