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

> Oxygen 2 Texturing Question
    FORUMS / Editing / Addon editing / Arma 3   ||  Tags: Arma, Help, Oxygen, Vest
> Lone Survivor Kit
    FORUMS / Arma 3 / Addons and Mods: Complete / Gear   ||  Tags: Vest, Uniform, Rifle