Hey man please write the code like this one
let brand=wixData.filter().contains("brand",$w('branddropdown').value);
let model=wixData.filter().contains("model",$w('modeldropdown').value);
let condition=wixData.filter().contains("condition",$w('conditiondropdown').value);
let fuel=wixData.filter().contains("fuel",$w('fueldropdown').value);
let transmission=wixData.filter().contains("transmission",$w('transmissionropdown').value);
let location=wixData.filter().contains("location",$w('locationdropdown').value);
$w('#dataset').setFilter(brand.and(model.and(condition.and(fuel.and(transmission.and(location))))))
Use this code please then tell is that work or not