Alert Suppression multiple nodes

Hi

We have an alert that is applied to all of our Database Servers. However we would like to supress this alert for certain servers and dataases that we aren't worried about.

We can supress the alert for one Server and Database like below and it works fine:

Supress Alert when all of the following apply

                Node Name is equal to SERVER_NAME

                Database Name is equal to DATABASE_NAME

However, what if it comes to supressing the alert for two databases and servers like below?

Supress Alert when:

               (Node Name is equal to SERVER_NAME

                AND

                Database Name is equal to DATABASE_NAME)

OR

                (Node Name is equal to SERVER_NAME2

                AND

                Database Name is equal to DATABASE_NAME2)

If you could point us in the right direction to the syntax used or if it is a limitation please let us know.

Thanks for your time

Phil