Complex sentence: His family had served as mandarins in the imperial court in Hue, and his father Ngo Dinh Kha was a counselor to Emperor Thanh Thai during the French colonisation.
Split into simpler sentences: His family had served as mandarins in the imperial court in Hue. His father, Ngô Đình Khả, was a counselor to Emperor Thanh Thai during the French colonisation.