This search feature is not google search, even you used ninjastic.space search you can't get a proper result of definition of bitcoin by asking "what is bitcoin" or "bitcoin definition" unless there's a thread/content with same title or not until you scroll and find something relevant. Use proper keywords when going to use a website search
People must do their due diligent research to find answers they want and they should never rely on a single tool to do that.
Search tools like Forum search, Google, third party tools like Ninjastic.space can not satisfy their curiosity and lack of basic knowledge.
For basic questions like "What is Bitcoin", they can try to search for Bitcoin WhitePaper and start from it, the official document for the creation of Bitcoin by Satoshi Nakamoto.
For more things for newbies, they can kick off with
Learn me a Bitcoin for beginners.