Perhaps you should try some spelling variations:
"said corporation" » "a corporation"
"_ corporation" » "_ corporate"
"railroad corporation" » "railroads corporation"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("said corporation") OR ("railroad corporation"))) OR ("_ corporation")).
• Removing quotes may allow a broader search: (((( said corporation ) or ( railroad corporation ))) or ( _ corporation )).
• Adding a wildcard symbol may retrieve word variants: (((("said corporation") or ("railroad corporation"))) or ("_ corporation"))*.