Perhaps you should try some spelling variations:
private partnerskih » private partnerships, private partner, private partnering
private partnership » private partnerships
private partners » private parties, private learners, private papers

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 partnerskih) OR (private partners))) OR (private partnership)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "public ((((private partnerskih) OR (private partners))) or (private partnership))".
• Adding a wildcard symbol may retrieve word variants: public ((((private partnerskih) OR (private partners))) or (private partnership))*.