Instead of using TAGS, you also could use —> CheckboxGroups, like shown in the following “interactive-example-tool” here…
https://www.media-junkie.com/pflegeservice
Choose —> “DB-Preset-3” i already setted it up for you.
Check this post here, which is running parallel to your own issue…
And take also a look onto the given options, like →
-AND-FILTERING / OR-FILTERING-FNCTION
-MEMORY-FUNCTION
and some more cool stuff. 
This example was made within 15min.