A visitor's visa allows you to stay in Norway or other countries in the Schengen area for up to 90 days over a period of 180 days.
Citizens of Vietnam and Lao PDR must apply for a visitor’s visa. Holders of diplomatic passports from Laos do not need a visa to visit Norway. The Norwegian Embassy in Bangkok is responsible for processing the applications.
If you plan to visit more than one Schengen country in the course of one trip, or if you plan several separate trips within a period of two months, you must submit your application to the embassy or consulate of the country that is your main destination based on the length of your stay, or the purpose of stay.
If you plan to visit several Schengen countries and the main destination cannot be determined, you must submit your application to the embassy or consulate of the country that is your first point of entry to the Schengen area.SCHENGEN AREA