Contact Information: General Registration Channels: - Website: https://vnso.org.vn - Email: dnghvn@gmail.com - Facebook: https://www.facebook.com/dnghvn.vnso - Address: 226 Cau Giay Street, Quan Hoa Ward, Hanoi - Telephone: 0243 833 1448 - Fax: 0243 833 4368 Direct Contact: * For Corporate Sponsors: - Contact Person: Ms. Tran Thi Kim Lien - Email: lientran.vnso@gmail.com - Hotline: +84 943 258 448 * For Patrons: - Contact Person: Ms. Pham Viet Hong - Email: viethong75@gmail.com - Hotline: +84 904 630 775 * For Members: - Contact Person: Ms. Phan Vu Bao Khanh - Email: phanvubaokhanh.vnso@gmail.com - Hotline: +84 936 179 403