4th floor, The Nine Building - No. 9 Pham Van Dong road, Cau Giay district, Hanoi
Tel. (+84 24) 3719 1216 / 3719 1217 / 3719 1218
Fax. (+84 24) 3719 1215
Email. hanoi@htt-group.com.vn
15 Dong Tay 1 (D.08), An Phu New City, 9 Nguyen Hoang, An Phu ward, Thu Duc City, Ho Chi Minh City
Tel. (+84 28) 3519 1561 /3519 1562
Fax. (+84 28) 3519 1563
Email. hcmc@htt-group.com.vn
19 rue de la Forge Royale, 75011 Paris, FRANCE
Tel. (+33) 6 07 64 19 79
Fax. (+33 1) 43 72 36 08