AND Logic between the checkbox values of the same field

Hi Guys,

I've created a filter with multiple fields.
Everything works fine except the Services fields (checkbox field).
When I'm selecting multiple checkboxes I get all the post that have any of the values selected instead of just the posts that have all the values.
How can I add an AND Logic between the values of the same field?
http://hnw1.oddballtesting.com/representatives/

Thank you!
Kind Regards,
Razvan