Examples
For information on AIDS in Ghana, try these searches in Google:
aids ghana (a general search across domains)
aids ghana site:.gov (limits to information from U.S. government sites)
aids ghana site:.edu (limits to information from U.S. educational institutions)
aids ghana site:.org (limits to information from non-profit organizations)
This may be one you haven't tried before:
aids ghana site:.gh (limits to information from Ghanaian websites)
See other country codes here.