Woocomerce PHP filter plugin customization

We have a custom woocommerce car filter plugin + import plugin. Currently, when i choose make, model and year than the filter plugin shows all of linked products from every products category. We have different sub-categories and we'd like to show only that products which are linked to the make,model,year and to the chosen sub-product category. We need this, because we have more than 110000 product in woocommerce store and we need to show only the requested products category products based on make,model, year filter options.