Hi!
There are two possible approaches to this.
1. Increasing the weight of taxonomy term based matches and decrease the rest. That will generally prioritize keyword matches when the product category matches with the keyword and should push them above the title based matches: https://i.imgur.com/Atah2kj.png
I think this is the best solution, as it applies generally.
2. Another possibility is using priority groups. This is a bit more advanced, but here you can select which categories to prioritize for which search phrase etc..