Perhaps you should try some spelling variations:
"improving overall performance contract." » "improving overall performance contracts.", "improving average performance contract.", "improving thermal performance contract.", "improving governance performance contract.", "improving coverage performance contract.", "improving rural performance contract.", "improving federal performance contract."
"improving fiscal performance review." » "improving financial performance review.", "improving fiscal performance risk.", "improving fiscal performance evidence."

Try widening your search to All Fields.

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