Perhaps you should try some spelling variations:
"public private partieship" » "public private partnership", "public private partnerships", "public private parties"
"public private partners" » "public private parties", "public private partnership", "public private learners"

Try widening your search to All Fields.

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 partners") OR ("public private partieship")).
• Removing quotes may allow a broader search: (( public private partners ) or ( public private partieship )).
• Adding a wildcard symbol may retrieve word variants: (("public private partners") or ("public private partieship"))*.