Here on Atlas, I searched for "private message". See screenshot of what I see when I do this. Note the "Showing results for private message, direct message & dm":
There is only ONE result for the query "private message, direct message, & dm"
But, if I click the "Show private message only" link, I get many more results.
Seems like the search synonyms (or some similar feature) are restricting the search unnaturally. Should be giving results for "private message" OR "direct message" OR "dm", but it appears the results are actually AND.
Not sure if this is a general Khoros bug or something about the config here on atlas.