The site: operator can restrict
searches to top-level domains, not just specific sites. So, specifying ‘site:co.uk
OR site:com’ excludes unwanted localised results. Conversely, you can search part of a site, such as ‘site:bbc. co.uk/news/health’ – Safari 8 actually hides this level of detail until you click the search field or enable the display of full addresses in its Advanced preferences.