He returned to Cambodia in January 1970 , and worked briefly as a secretary at the Interior Ministry .
After completing his master 's , Ranariddh took the PhD qualifying examinations in 1969 .
Ranariddh returned to Cambodia in January 1970 , and worked briefly as a secretary at the Interior Ministry .
After completing his master 's , Ranariddh took the PhD qualifying examinations in 1969 .