SQLite - Extracting a single word in a text field

I have a database filled with pure texts. I want a query to find some similar words to a specific sub-word. something like suggesting or guessing. pure text = "this is a database filled with data." the sub-word I am looking for = "da" now the result of the query should be only a column of "single word"s like: "database , data"

any help would be appreciated.