Perhaps you should try some spelling variations:
private paperskih » private partnerskih, private payers
private ownership » private partnership, state ownership, private partnerships
private papers » private prayer, private property, private learners

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: public ((((private paperskih) OR (private papers))) OR (private ownership)).
• Adding a wildcard symbol may retrieve word variants: public ((((private paperskih) or (private papers))) or (private ownership))*.