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".

Found in forums

> Happy new year 2011!!
    FORUMS / Offtopic / Chit chat   ||  Tags: 2011, New Year