TK 165 then JU 423 at Istanbul
Hanoi → Istanbul → Belgrade
Timetable, Istanbul time
05:35TK 165 from Hanoi at the gate
17:45JU 423 to Belgrade leaves the gate
12 h 10 apart on the timetable
JU 423 leaves 12 h 10 after TK 165 arrives on the timetable: more than half a day, so not a connection we count.