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

> Respawn As Vehicle Unit
    FORUMS / Editing / Mission editing / Arma 3   ||  Tags: Airplane, As, In, Jet, Respawn, Unit, Vehicle