Search engine doesn't search all terms or allow for modifiers ("and," "or," etc.)
In the old BB software, if you searched via the quick search dropdown shortcut, it automatically searched *all* terms, so results were more useful. For example, if I wanted to search "Irish Sport Horses," all results that came up had to have all three terms, thus making the posts much more relevant.
(On the other hand, the old advanced search would search any of the terms, so posts that had "Irish," "Sport," or "horse" in it would come up, and there would be >500 results.)
Now none of the searches allow for either searching all terms or using an AND modifier. When I search for "Irish Sport Horse," the results come up as separate terms, even if I type in "AND" in between each... this happens in both the quick search dropdown and advanced search.
Additionally, there's no way to select "show posts" when you search from the dropdown in the blue bar at the top (Settings, FAQ, Member List, etc.). IIRC, the old forum software allowed advanced default search settings to apply as your default when you used the quick dropdown search, so if I chose "posts" as the default results in the Advanced search, it would also apply to Quick search.