Steve, the Administrator and owner of the forum, knows about this problem. In due course, he plans to replace the forum software. I have tested the search feature for that software and it works better but its database is not populated with all of the forum's posts for search purposes.
For some reason, the search function has a problem with some symbols and abbreviations (like FDA) and other brief entries and it won't always find keywords with an apostrophe s. For example, it might not find Giordano's but it will find Giordano.
For now, I suggest that members use the Google search feature. I usually use the Advance search feature first and when it does not find what I am looking for I go to the Google search feature.