Logical OR condition in Wiki tag search

I want to search the wiki articles which contain any of the specified tags (e.g. as7, jboss7, jbossas7, jboss_7_userguide). However, the current search dialog supports only logical AND operation. If would be great if some logical operator is supported in the search query, such as AND and OR (e.g. as7 OR jboss7 OR jbossas7 OR jboss_7_userguide).