When you visit Google, do you go to Google.com.pk? If so, you should see pages from the whole world, but with a definite bias towards those from Pakistan. (If you only want see pages relevant to Pakistan, click "Pages from Pakistan" in the left-hand panel of the results page.)
However, if you go to Google.com, you should see pages from the web as a whole. There might still be a small bias towards Pakistani sites, but not so much as in Google.com.pk.
If you want to see sites from a specific country, go to google.com, do the search, then click "More search tools" in the left-hand panel, then click "Custom Location", then enter the name of a country or city.