The message "Your search for "___" did not match any products" means Amazon does not have a product page for the item you entered, under the UPC/ASIN you entered.  You can double check this by going to and entering the code in the search field, as shown below.  This item cannot be listed via ScanPower since no product page exists and must be listed in Seller Central.

There are potentially millions of combinations of category, product variations, parent/child relationships, etc.
  Going though Seller Central to do this is a one-time deal that ensures completeness of data and correct categorization.