I can make an API request like this and it will give me ads that contain "taxes" using the search_terms parameter:

"https://graph.facebook.com/v20.0/ads_archive?ad_reached_countries=US&ad_type=POLITICAL_AND_ISSUE_ADS&ad_active_status=ALL&media_type=VIDEO&fields=id%2Cspend%2Cad_snapshot_url%2Cad_delivery_start_time%2Cad_delivery_stop_time%2Cdelivery_by_region%2Cimpressions%2Cad_creative_link_titles%2Cpublisher_platforms&access_token=secret&search_terms=taxes"

That works as expected. Now, is there a way to make a request to get just a single ad by sending its ad id (e.g., 1550495452480323). Adding the parameter "...search_terms=1550495452480323" doesn't work. It gives no results.