Simple search widgets can have one or more filters applied which are ANDed together, and a filter can have one or more rules applied which are ORed together. The words "AND" and "OR" should be displayed to the user.
2. "AND" needs to be added to the display, between filters. It's position should be centred vertically and horizontally between the the cards displaying the filters.
See the Term FIlter Builder tool in licenses for an example of positioning/styling.