It’s great that there is one office of Vietnam embassy in Helsinki, Finland.
Up to now, Vietnam’s embassy in Helsinki is the only Vietnamese representation in Finland. This office allows your visa issuance, legalization requests to be processed conveniently.
Regarding visa for Vietnam, in addition to embassy visa, citizens and residents of Finland has an alternative way to get a Vietnam visa, which is called visa on arrival (VOA). You can see their brief below:
For details, you may also read: