Vietnam Airlines allows corrections, not full name changes in most cases. That means if the name on your ticket doesn't exactly match your passport or government-issued ID—but you're still the same person—you can request an update.
Mistakes happen—but Vietnam Airlines makes it possible to correct them if you act quickly. The sooner you catch and report the error, the easier (and cheaper) the fix will be.
Still confused or need personal assistance? Get all the details, steps, and support here: https://www.myflightfares.com/flights/vietnam-airlines/name-change-policy/