KR 721 then 8M 334 at Bangkok
Siem Reap → Bangkok → Yangon
Timetable, Bangkok time
17:05KR 721 from Siem Reap at the gate
15:408M 334 to Yangon leaves the gate
22 h 35 apart on the timetable, overnight
8M 334 leaves 22 h 35 after KR 721 arrives on the timetable: more than half a day, so not a connection we count.