Word prediction in a website search form?

Question

Google

Hello. Guys tell me in which direction to look. There is a google search in Yandex, and in general, many sites use word prediction in their search engines. For example, I write they say ..... and here the search engine suggests "shellfish", "pray", etc.
I would also like to do something like this on my site, but I can’t find which way to dig.

Answer 1

If you take a movie search, then type a query in the search engine "Live Search" and you will see everything how to do it. Google is a little more difficult