The pair were found "staying in a hut about 5m from the ground and both men were dressed only in loincloths made of tree bark," Tuoi Tre newspaper said, adding they were found with several handmade tools.
The pair can speak only a very little of their ethnic Kor language.
The men were first brought back home by a younger son in 2004, Dan Tri online newspaper said quoting local authorities, but they could not adapt to living in the village and returned to their forest home.
The pair "preferred their independent life to that of the traditional Vietnamese family", the report said.
The younger son visited them once every year, providing some necessities. But they were recently spotted by local residents and reported to the authorities who drew them from the forest, Tuoi Tre newspaper added. The men were reported to have survived on fruit and corn they had cultivated.
Lang reportedly "chewed betel and smoked continuously, glancing at everybody around him with a dull look", according to the Tuoi Tre report. The father is under medical treatment for exhaustion.
- AAP