Okay, not working as in the search results in all records not just the ones that have values in the specified database fields. Here is the search link: shop_online.html and here is the results php file.
There are 2 products in the testing environment with these values to search.
Product 1: ProductSKU 12345 and ProductName Test Product
Product 2: ProductSKU 987654 and ProductName Just A Test