Perhaps you should try some spelling variations:
"internally disabled people" » "internally dispalced people", "internally visible people", "internally stable people"
"internally displaced person" » "internally displaced persons", "internally displaced people", "internally disposed persons"

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: (("internally displaced person") OR ("internally disabled people")).
• Removing quotes may allow a broader search: (( internally displaced person ) or ( internally disabled people )).
• Adding a wildcard symbol may retrieve word variants: (("internally displaced person") or ("internally disabled people"))*.