Perhaps you should try some spelling variations:
"principles state" » "principles study", "principles some", "principles systems"
"provinces states" » "provinces chapter", "provinces cities", "provinces des"
"princely states" » "principal states"

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: (((("princely state") OR ("principles state"))) OR ((("princely states") OR ("provinces states")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"princely state\") or (\"principles state\"))) or (((\"princely states\") OR (\"provinces states\"))))".
• Removing quotes may allow a broader search: (((( princely state ) or ( principles state ))) or ((( princely states ) OR ( provinces states )))).
• Adding a wildcard symbol may retrieve word variants: (((("princely state") or ("principles state"))) or ((("princely states") OR ("provinces states"))))*.