A 19-year-old Vietnamese student has become a viral sensation after surviving nearly two days alone in a remote mountain by snacking on a box of the popular sweet treat Choco Pies. Nguyen Tuan Anh, a student at Dai Nam University, had set out on 19 April with friends for a hike up Tam Dao mountain, about 70km north of Hanoi . The group of 10, accompanied by a guide, reached the summit early in the afternoon after a seven-hour climb and began their descent shortly after. Mr Anh, who had limited hiking experience , became exhausted in the heat and got separated from the group after stopping to rest. Believing there would be only one path down, he soon found himself lost as the trail seemed to disappear and his phone lost signal, Vietnamese outlet VnExpress reported. Man made lake on the foot of Tam Dao mountain (Getty Images) What followed was a disorienting ordeal in one of the region’s more treacherous landscapes.…