Lightroom 6 - finding multiple faces with metadata filtering

Is there a way to perform metadata filtering in Lightroom (version 6) that allows finding images that contain multiple faces? For example, I would like to see image where BOTH of my kids are in them (i.e. 'AND' condition). I know you can use the metadata filtering but it seems to allow only for 'OR' combination - i.e. where either of my kids is in the image but not both.

Answer

Lightroom search does have its weaknesses, but finding the intersection between multiple keywords is definitely something it can do. My favourite way to do this is using the "Library Filter" menu. Select all Photographs, then activate "Metadata" filter, change the first column to "Keyword" and select your first keyword. Then change the second column to "Keyword" again and select your second keyword from the list. The results below will match the intersection of your selected keywords.