If you plan to temporarily reside in multiple locations, you must declare the first address where you will stay temporarily.
After entering Vietnam, you must go through the direct manager or operator of the accommodation establishment to declare your temporary residence according to Vietnamese law (this must be done each time you change your temporary residence location). 

To be assisted in filling out the application form, please feel free to contact us:

Hotline: +84.909.597.525 

Website: https://www.vietnam-immigration.org.vn/ 

Email: visa@Vietnam-Evisa.Org