A normal week has one or two days OFF(recently), so assuming five days of work:
Day 1. SGN-HKG-SGN
Day 2. SGN-PNH-VTE-HAN Layover in Hanoi (5 star hotel)
Day 3. HAN-VTE-PNH-SGN
Day 4. SGN-REP-SGN-HUI-SGN
Day 5. SGN-DAD-SGN-KUL-SGN
Day 6. OFF
Day 7. OFF
Generally all day flights, home at night.