Need Google search expart

When I need edu gov backlinks

I search it on google. like :

Site:.edu by discuz

google show me only x.x.edu site.

then I search again -

Site:.edu.uk by Discuz ( for UK domain )

google show me only x.x.edu.uk site.

But I want all domain by one search.

like: when I search edu by discuz...Google will show me all domain edu site that hosting by Discuz

any trick for this ?

Try this site:.edu "Add Disqus to your site"

godesi said:

Try this site:.edu "Add Disqus to your site"

Click to expand...

not working..
its show only x.x.edu site
but i want x.edu.tw , x.edu.uk ,x.edu.cn etc all at once