Hi guys, Welcome to the Advanced Video Search Engine, and you are watching Tập huấn IMO 2021 - Hình học 1 - Thầy Nguyễn Văn Linh. That video is uploaded by Bring Math to Everyone at 2021-08-22T23:11:07-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [JAHtiT_lNcE]