To get the U.S. results (for eg.), run the query on google.com (google.com/ncr) and then append "&gl=us" to the URL. For eg. compare :
https://www.google.com/search?q=salem&gl=us
https://www.google.co.in/?q=salem&gl=in
See also : http://www.labnol.org/internet/search/how-to-see-google-resu...