Border crossing from Vietnam into Laos

Hi there,

I am traveling to Vietnam in a month and was after some information. Is it possible to cross into Southern Laos from Vietnam? I know there are border crossings further up north but my trip is originating in Ho Chi Minh and I was hoping to go North to Nha Trang, then from there head North West and cross into Laos. From there head South into Cambodia, onto Siem Reap, Phnom Penh then back to Ho Chi Minh.

Any information on any of this is much appreciated.

Thanks

isthismarriedmanjustflirting