Filtering with multiple choice depending on OR, AND previous selection

i'm working on a site where users need to filter candidates (Human resources site) on different ways... The thing is, they have for example 6 options displayed with checkboxes, if they select 3 options they can expect that the result could be candidates with those 3 options at the same time or candidates that could have any of them...

How do you think is the best way to filter with those two options? Do you think is clear if we offer the user both behaviors?

I think a good way could be showing a switch before options where you choose if selection is kind of OR - AND...

Thanks before hand.