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

> ArmA3 Hitman The Assassin
    FORUMS / Arma 3 / Missions WIP   ||  Tags: Hitman, Maxjoiner
> Hitman Addon
    FORUMS / Arma 3 / Addons and Mods: Complete / Units   ||  Tags: Hitman, Maxjoiner