The SOP for these sorts of pages is to find high authority domains that have site search facilities that 1) display the query string content in the page title and/or the page body, and 2) are indexable (no 'noindex' tags or robots.txt directives). You then try and index the pages populated with your query strings using the usual methods of backlinking or redirect page inspection requests.
People will still need to copy and paste whatever url you're promoting into their address bar, which is the crazy thing in my mind - but in some geos apparently this is common practice.