To search for sentences in redis

I'd like to put a comment in redis and search for the full text.

The types that redis can handle can be String or List, but it seems that the search for strings is done using the key.
In the first place, it may be wrong to use redis or redis itself.

If you are able to search for the full text of the comment using redis, please let me know how to store it and how to search it.Any helpful URL is fine.

Thank you for your cooperation.