Filtering in a sheet


I'm creating a filter where i select a few items from a list and also blank items. But when I apply the filter it doesn't return the blank items? i can create the filter using the "any of the following conditions" but then i can't include other conditions that i want. Any idea why the blank rows aren't returned?

Is there any plan to create a more flexible system for filter instead of all AND or all OR conditions? Where you could have a combination of ANDs and ORs?