Corporate businesses are those large organisation that have policies in place to support their community. These policies will generally be found on their web pages which you should research if you are thinking about going down this road (you'll probably find them under Corporate Responsibility or Community Investment).
To be successful in finding this kind of support you will have to meet their criteria and work to their funding timetable and have good personal contacts with them. Funding archery teams going to India will be low on their agenda whereas helping deprived communities will be high.
Looking for support from this area should not be your first activity but there is a way that you can get them to help you indirectly. Many corporate business support their staff who conduct fund raising, and so you should look to you club members to find out what their employer's policy is in this area. Here is what the Royal Bank of Scotland do for their members:
"If you are a community or youth group, local organisation, school or charity based in the UK or Eire, and you are seeking our support for your good cause or event, we would encourage you to get our employees involved. They are best placed to identify the needs of the communities in which they live and work and if you can persuade them to support your activity - as fundraisers, as volunteers or as payroll givers, RBS group will back their commitment with cash."
The above information comes from the RBS web site.