I'm login with Administrator (not Super User) to add products in VM2. When I copy and paste from other website, html tag was removed when i save product.
I login with Super User, it working nomaly.
I copy and paste:
(http://www.trangtrinoithathiendai.com/3.jpg)
When i click save:
(http://www.trangtrinoithathiendai.com/4.jpg)
In older versions it was the case that only superadmins can put html code into descriptions. You should be using at least version 2.6.10 ( http://virtuemart.net/news/latest-news/462-security-release-of-vm2-6-10-and-vm2-9-9b )so maybe update to the latest and check there. Using ACL to set edit permissions may help.