Q: Why does the Spotlight Search Suck?

I'm serious I don't know if the most recent update did this or something but Seaching for anything ***** on this.

For an example of why its terrible let me share the troubles I was having today. I was trying to find an old paper I wrote a while back. I couldn't remember the name of it but I remembered the topic which was about sensory issues. So I typed Sensory into the search bar and the I got like 1 or 2 word documents and a bunch of unrelated files.

As another test I put in my Name into the search engine... and found out how to make it only find word documents. I found 12 files at most. I haven't thrown away any past school work for a long time so either I've only put my name on 12 different assignments ever or this search engine doesn't work.

On and by the way I did end up finding the document later. It in fact did contain both my name and the word sensory. I'm just frustrated that this search engine doesn't work. Am I doing something wrong? Is there a reason that it can't find documents that contain words? Can someone explain this to me?