Фейсбук не очень равнодушно относится к поиску по себе. А на примере этой истории можно устроить тотализатор - через сколько их закроют или не закроют вовсе. techcrunch.com/2015/12/02/facebook-advanced-search/

The Unofficial Facebook Advanced Search Engine

Facebook doesn’t have an easy-to-use advanced search engine, so one guy built his own. “Search Is Back” lets you use familiar drop-down menus to find people by city, relationship status, school, first name, and more. Plus you can search for photos, events, posts, and other stuff. What’s special here is that you don’t need to know […]