search tags using previous tag search

I wonder if it's possible to search for a tag and if you get a lot of results, you can search in these results using another tag narrowing down the possibilities.
I Tried AND but that didn't give the expected results.
Is this possible or would it be a good suggestion for the forum. At this stage there aren't that many topics, but as those will grow, we could use more advanced search possibilities.
Cheers