This JQL stuff is sometimes so awesome and so many times completely and totally non-intuitive.
There seems to be no way to do a search that simply excludes a single word even though the instructions suggest it should work, but it doesn't.
Examples that all fail:
project = HLP AND text ~ "create" -build
project = HLP AND text ~ -build
project = HLP AND text ~ "create" NOT "build"
project = HLP AND NOT text ~ "build"
and several others that should seem to work but don't according to:
https://confluence.atlassian.com/jirasoftwarecloud/search-syntax-for-text-fields-764478343.html