Can someone provide me a sample code how I can have a "search" field search for any keyword that matches my records in my database.

I have a list of agencies we fund, they have a 25 word description column. If someone searches for any word and it matches that of the "description" column list records by ID desc.

Is this possible to do a simple search query? find word and/or and list records, otherwise return sorry, no records showing that keyword.