www.google.ca : Google Canada
www.google.com : Global/America
www.google.co.uk : United Kingdom
Now what you have to do is to type in the URL base on your location such as www.google.ca if you live in Canada. If you want to change this permanently, just set the default search preference URL on your browser.
There are other specific URL that are useful:
Ncr refer to "no country restriction" which is an alternative to www.google.com and this will always takes you to google.com without redirecting you.
This is a default url when you search using Google.com. What this trick do is instead of going to google.com hompage which will redirect to a region specific search, it will directly open a search result from Google.com which prevent redirect.