You can learn more about how search works & the limitations of it here: https://itch.io/docs/creators/getting-indexed#limitations-of-search
For topic based discovery, we suggest people use tags and the corresponding browse page.
Marketing a project is challenging, and we have to balance the needs of all of our developers at the same time. Sadly this makes us unable to guarantee that just because you used a word in your title that you’ll appear on the top of the list for it. Of course our search isn’t perfect, but I still recommend looking into all of your options to help others find your work, instead of depending on one thing specifically.
Thanks