@stephane.kattie, thank you for your patience.
There are no limitations on the number of attributes, added to the Filters field. You can set as many filters, as you need. Please take a look at this documentation:
Indeed, you had problems with displaying the result of the filtering because of your syntax.
You have indicated the condition, that if statement A (Product Display…BrandFilter) AND statement B (Product Display…VariantFilter) are true, then display the result.
When you add the third statement С (Product Display…TypeFilter), with the AND operator between them, you limit the search action to another condition, which, in turn, reduces the likelihood of output.
Your current syntax is (a) AND (b) AND ( c). Can you please try to change it to (a AND b AND c)/(a AND b OR c)?
I hope it helps.
Regards,