I’ve also noticed this occasionally; thanks for providing a specific example I hadn’t seen so far. The Forum’s search feature has improved since we launched, but I also use Google sometimes, and it seems like they should be able to index us well.
The tech team will look into what’s going on (especially with regard to the “underline” character response, which I agree is strange).
You might also try using Google’s Search Console to better understand how Google is scraping the site and what users are searching for (if you aren’t already using it).
Here’s another example: https://www.google.com/search?q=%22SHOW%3A+A+framework+for+shaping+your+talent+for+direct+work%22