The query you're making in this case produces a lot of results that are returned in French. We have a more strict "language filter" that we run if your region is a region such as BE - nl, that we take as an indicator that you want Dutch results. Since all of them return in French (or otherwise not Dutch), everything gets filtered out.
I've prepared a change that will make this filtering not-so all-or-nothing that should fix this and other similar cases that will go out this week.
Thanks!