Vietnamese roads corner differently from European ones: the surface changes mid-turn, a bus may be cutting across your lane, and the racing line is whatever the traffic has decided it is. Cornering well here is about margins, not speed.
Slow in, look through
Enter the corner slower than feels necessary, then look through the turn at where you want to go — the bike follows the eyes. Keep a steady throttle through the turn and accelerate gently only when the exit is visible. On a scooter, weight your inside footpeg slightly and keep your body relaxed; stiff arms make the front wheel push wide.
Assume the corner hides something
On rural roads, treat every blind corner as if it contains a parked truck, a pothole or a dog. Brake before the corner, not in it, and keep to your side — wrong-way riding is heavily fined and is genuinely deadly on bends, as wrong-way-riding-fine-vietnam explains for the legal side. Sand and gravel collect at the inside of corners after rain; gravel-roads-motorbike-vietnam covers riding on loose surfaces.
Cornering in the city
In Hanoi, corners are mostly intersections. Slow down for every junction, cover the brakes, and expect a car to turn across you from either direction — right-turn-on-red-vietnam shows how unusual some of these movements are to foreign riders.
Wet and painted lines
Painted road markings, metal manhole covers and smooth asphalt patches are all slippery when wet. Reduce lean angle on wet corners and avoid braking over these surfaces; riding-motorbike-heavy-rain-vietnam covers the wider wet-weather picture.
The one-line version
Enter slow, look where you want to go, keep the margin wide — Vietnamese corners reward patience far more than speed.