Hi PerBonomi tealiumjustin
There was indeed a change to the LiQL syntax that the Doc team didn't know about. I'm creating a ticket to get our Search API Overview updated.
Here is the response from Engineering:
When we want to return messages that have at least one of these terms in the field we need to enclose in double-quotes.
This will list every post which has any of those terms in the subject field.
select subject,body from messages where subject matches "('attachment','android')"
This will list only those posts which have both terms in the subject field.
select subject,body from messages where subject matches ('attachment','android')
Please let me know if this solves your trouble.