Google Search - multiple sites in site: advanced search?

-I want to search more than one site for a particular string. This "query site:example.com" I know, but what I use to search few or several sites? Something like "query site:example.com,example.org" or "query site:example.com site:example.org" don't work.You need to type the following:



site:example.com OR site:example.org keyword



OR must be in uppercase.



For example, search Google or Yahoo sites for Microsoft http://www.google.com/search?q=site%3Ago鈥?/a>Looks like if your better with wildcard characters you might e able to do something, searching



site:*art.com monet



resulted in a number of diferent sites all ending in -art.com