AK 513 then AK 719 at Kuala Lumpur
Hanoi → Kuala Lumpur → Singapore
Timetable, Kuala Lumpur time
19:15AK 513 from Hanoi at the gate
18:20AK 719 to Singapore leaves the gate
23 h 05 apart on the timetable, overnight
AK 719 leaves 23 h 05 after AK 513 arrives on the timetable: more than half a day, so not a connection we count.