Hi
It's possible to search for an exact productnumber in this way:
/Default.aspx?ID=1&eComSearch=1&ProductNumber=2000&ProductNumber_Type=3
Source: http://developer.dynamicweb-cms.com/documentation/for-developers/ecommerce/parameter-based-search.aspx
But is it possible to search for multiple products? Something like ...
/Default.aspx?ID=1&eComSearch=1&ProductNumber1=2000&ProductNumber1_Type=3&ProductNumber2=3000&ProductNumber2_Type=3&ProductNumber3=4000&ProductNumber3_Type=3