Complex sentence: After few months he returned the scholarship and decided to go to San Francisco to work and save money and than in early 1958 he returned to Austria to complete his studies at the University of Innsbruck, where he received his Ph.D. in 1959.
Split into simpler sentences: After few months he returned the scholarship and decided to go to San Francisco to work and save money. In early 1958 he returned to Austria to complete his studies at the University of Innsbruck, where he received his Ph.D. in 1959.