Vietnam visa on arrival for second entry by land

I am visiting Vietnam in December 2015. My itinerary is as following: arriving in Vietnam on December 3, 2015 by air, and then leaving the country for Laos on December 21, 2015 and then coming back to Vietnam on December 25, 2015 and finally leaving Vietnam for my home on December 29, 2015. Can I use Vietnam visa on arrival?
Visa for Vietnam - Visa to Vietnam

Date for Vietnam visa

My visa date of propose arrival is March 15 can i arrive in Vietnam before that date?
Applying for Vietnam visa on arrival from Hong Kong HK

How to get a Vietnam visa on arrival

It is very simple to get a visa on arrival to Vietnam. Just following the below steps, you will find this way of visa application very convenient.
Vietnam visa application from Hong Kong - HK

Legal base for visa on arrival

Today, with the open policy of the Government to welcome more and more foreign tourists, foreigners may find it much easier to obtain a visa to Vietnam since there are currently 2 options to go about this matter.