two entries in vietnam

Dear Antonella scorianz

Thanks for your concern,

For your first entry 

Vietnam offers 15-day visa exemptions with single entry for visitors from Italy

.. However, their passports should have at least six months of validity upon the date of arrival to meet airlines’ requirements, and their arrival date is NOT within 30 days from their last exit date with visa exemption. Otherwise, they will need a Vietnam visa.

If you stay more than 15 days please apply for Vietnam visa

For the second entry 

Please apply for 1 mont single tourist visa at https://www.vietnam-evisa.org/apply-visa.html

Apply visa online, You will get visa stamp on the passport upon arrival, All you need to do is fill your information in the form and make payment online.
After that, we will send You the approval letter via email, please print it out to board the plane and use it to get visa stamp on the passport upon arrival.

At the monent we don't have any information about Cambodia visa 

We apologize for any inconvenience this may cause

Best Regards.
Stepfanno Tran (Mr. )