Vietnamese trade mark: DNTN Thương Mại & Dịch Vụ Vi Tính THIÊN AN English trade mark: THIEN AN Technology Trading & Services Co., Pte. Head office : 239/34/28 Trần Văn Đang Street – Ward 11 - 3rd District - Hồ Chí Minh City. Phone : (84-8) 35260445 - 0908188337 - 0996899377 Fax : (84-8) 35260445 Email : sales@thienantech.com ; it@thienantech.com