Perhaps you should try some spelling variations:
mock volunteers » among volunteers, local volunteers, how volunteers
das regiment » a regiment, his regiment, das regime
9th regiment » 89th regiment, 29th regiment, 11th regiment
new mock » new monk, view mock, new mode

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: 7th new mock volunteers ((das regiment) OR (9th regiment)).
• Adding a wildcard symbol may retrieve word variants: 7th new mock volunteers ((das regiment) or (9th regiment))*.