Perhaps you should try some spelling variations:
"improving urban performance contract." » "improving urban performance contracts.", "improving bank performance contract.", "improving loan performance contract.", "improving can performance contract."
"improving overall performance review." » "improving average performance review.", "improving thermal performance review.", "improving governance performance review.", "improving overall performance risk.", "improving overall performance evidence.", "improving coverage performance review.", "improving rural performance review.", "improving poverty performance review."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving overall performance review.") or ("improving urban performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving overall performance review.") OR ("improving urban performance contract.")).
• Removing quotes may allow a broader search: (( improving overall performance review. ) or ( improving urban performance contract. )).
• Adding a wildcard symbol may retrieve word variants: (("improving overall performance review.") or ("improving urban performance contract."))*.