Perhaps you should try some spelling variations:
"internally diseased persons" » "internally displaced persons", "internally dispalced persons", "internal disease persons", "internally disabled persons"
"internal diseases persons" » "maternal diseases persons", "intestinal diseases persons", "bacterial diseases persons", "internal disease persons", "internal diseases personal", "internal diseases lessons"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"internally diseased persons\") OR (\"internal diseases persons\"))".
• Removing quotes may allow a broader search: (( internally diseased persons ) OR ( internal diseases persons )).
• Adding a wildcard symbol may retrieve word variants: (("internally diseased persons") OR ("internal diseases persons"))*.