After some link building techniques using Senuke x and other some blackhat tools I was able to make my page in first page of Google USA for a particular keyword. The page also shows in first page of all other Google search except Google India for that keyword. Since my keyword is mostly used by Indians majority of the users search the keyword in Google India. Also Google USA automatically redirects to Google India in my country. So I am losing about 95% of search results. I think this is a strange problem and I will be helpful if anybody finds me a good way to escape from this strange problem.