According to the Atlassian documentation, you can search for words contained in a text field like so:
description ~ term
It also indicates you can group terms like so:
description ~ (term OR "different thing")
But when I try that, it shows that the syntax is wrong.
I want to do this, but with grouping (because I will have more than 2 terms, and I'd like to keep the query easy to read and short-ish):
description ~ term OR description ~ "different thing"