It can be difficult to find that exact post you remember seeing on your timeline. If you need advanced search tools for Facebook, well, Search is Back!
This third-party tool combs through through your own timeline or through the public one. The broad categories are people, events, posts and shares, and photos, each with further filters. Within "people", you have further parameters like gender, interests, relationships, location, company, school, and more. Type your keyword, hit search, and it takes you to Facebook to show the relevant results.
It's basically giving you the features that make Graph Search really useful, but puts them in an easy-to-understand interface.