Google has a link at the bottom of the "local" home page to use the global site. This should be remembered using a cookie. I don't know whether other sites have a similar feature.

As a workaround, some users will sign up with a proxy service to re-route all their requests through a U.S.-based IP address. I don't have any personal recommendations on those, other than to choose whom to trust carefully because they see all of your traffic.

Hello Zanman, if you searching from search bar, you can try Mycroft Project plugins, find what you need: http://mycroft.mozdev.org/google-search-plugins.html

thank you

You can try and download SecurityKISS which is a proxy and select a USA location. It shouldn't take long and SecurityKISS is free and trusted.