Several comma-separated tags will be considered as logical AND between them. You can also use semicolon for logical OR. AND has a priority over OR and you cannot use parentheses for logical grouping. Asterisk (*) within a tag will be regarded as a mask for "any string".
The time to project expiration is a string in the "2 days 18:10:45" format. The order and divider can be customized via resource string located in the inc/pte.rc.php