Excldue multiple strings from syslog messages

I'd like to exclude multiple strings from syslog messages. I know how to do this for a single string:

user@SRX_FW# show system syslog host 10.1.0.40
any notice;
match "!(.*WEBFILTER_URL_BLOCKED.*)";

My question is how do I format the syntax to ignore multiple strings? The syntaxes that logically made sense to me returned this error: repetition-operator operand invalid at '!(.*WEBFILTER_URL_BLOCKED.*|*RT_SCREEN_IP: IP spoofing*)'

Thanks,

Matthew