Hi @JasperJeff,
I’m not sure why the results are returning zero matches, however, another member of the community implemented something similar a while back.
Although I’ve since removed the feature, I did test the code shared in the topic below and it worked as intended. With a few tweaks, you can also have the suggestions that pop-up include the listing tags/keywords, instead of, or, in addition to listing titles.
See this topic:
I hope this helps!
Cheers,
Chris 