http://jjz5ajknu5rku4p6xb6i5xwjnp3nd6c3jwi2qnzbpaodyf7g2lja.b32.i2p/support/query-pr.html
The result of the search is the logical "and" of all
of the groups of check-boxes and text fields specified.
For instance, if you check the "bin" and "kern" buttons
in the "Category" section, and the "Serious" and "Critical"
buttons in the "Severity" section, the query will return
all problem reports that are in the "bin" or "kern"
categories, and that have either "Serious" or "Critical"
severity.