man page for tracker3-tag omits --and-operator from example
From the man page:
-r, --and-operator
Use AND operator for search terms instead of OR (the default). For example:
$ tracker3-tag -s -t sliff sloff
Should show files in the database that have both the sliff and sloff tags.
I believe this is intended to be
$ tracker3-tag -s -t sliff --and-operator sloff