I know this answer is covered already but it does not seem to be working for me. How to force Google to use a keyword?

I would like to search Google and force it to return results about MotionBuilder. As you can see by the screenshot provided I have put it in double brackets like the other question has suggested. Google has ignored this however and most of the results are about Maya. Some of them are to do with motion builder but other search terms will return entirely maya results. I would like to ignore any results that do not contain the word "MotionBuilder"