Hi,
I don't know what you meant by "Search box" doesn't work.
I run couple tests and search several keywords, like: Zomo, Gemini etc.. I was able to find the VM products.
If you are talking about "Search box" doesn't find the Joomla Articles, then it is normal, because this is the Virtuemart Search Module, and it is for finding the virtuemart products (it is not a joomla search module)
Regards,
Support