the search is a keyword search of the flowing columns:
a search of:
will look for Oil OR Filter in those columns. using Double Quotes around the Search:
Will cause it to look for the string Oil Filter in those columns.
you can edit the webassist/plugins/catalog/results.php or results_grid.php page to change the columns that are included in the search.
look for the following line:
$KeyArr1 = array("ps4_products.ProductID", "ProductSKU", "ProductName", "ProductCartDesc", "ProductShortDesc", "ProductLongDesc");
and remove the columns you dont wish to search on.