One Korean, 14 Singaporeans and two Vietnamese were rushed to the Hue Central Hospital.
Pham Nhu Hiep, director of the hospital, said one had suffered a spinal cord injury, one had a dislocated groin, one had a broken leg and another a radius fracture. The remaining patients had flesh wounds and were undergoing CT, X-Ray and ultrasound procedures for diagnosis.
The patients are in stable condition, doctors said.
The injured students were part of a group of 30 traveling in two buses to the Bach Ma National Park in the central province of Thua Thien-Hue. The two Vietnamese injured were the driver and tour guide.
The 24-seat bus crashed about one kilometer away from the national park's entrance as it headed downhill, at around 3 p.m. The front portion of the bus was badly crushed.