VU 305 then VZ 132 at Bangkok
Hanoi → Bangkok → Chiang Rai
Timetable, Bangkok time
14:10VU 305 from Hanoi at the gate
13:20VZ 132 to Chiang Rai leaves the gate
23 h 10 apart on the timetable, overnight
VZ 132 leaves 23 h 10 after VU 305 arrives on the timetable: more than half a day, so not a connection we count.