Hi,
I have "Product SKU" selected in the backend settings (Available Search Fields), however when trying to search for a specific SKU the search in the main page, this does not return me the product.
2.0.6 && 2.0.9b
I have the same problem, using 2.0.10. I use product sku's like XX 11-234. When i try to search the minus gets filtered out an only XX 11234 stand in the search form.
Seems to be a regex or filter problem with the search strings.
virtuemart search doesn't work with dashes or spaces. You can try just inputting one section of your search input. Maybe the most unique part of your code. ie: i believe would be 234 and see if it works. solved mine like this. Hopefully, someone can offer a solution to improve the search plugin be it by coding or providing a new plugin.