I don't know how you found this page, but this function has been deprecated!

The advanced search function returns X number of results based on your parameters.

• Limit - The number of posts to return
• Query - The item you are searching for

$asearch LIMIT QUERY

or

$a LIMIT QUERY

$asearch 5 i9-9900k

Will return the last 5 newest posts for a i9-9900k