Hi,
Okay, the problem is, that there are a lot of matches matching ‘Jaco van Hoorn’ as a result. I have re-indexed the index table, and enabled the author matching as well for better relevance.
I have also made a bit of change to the configuration like so, so that exact matching is evaluated first. There are still lot of results, so I increased the results limit, and also enabled the ‘more results’ loader feature. Now it will be in the list for sure. You can change these back of course, if you want to. I believe this might be the closest possible configuration to your needs.
If you prefer displaying some results over others, you can do that, by using the result priority and priority groups feature.