Perhaps you should try some spelling variations:
"improving social performance contracts." » "improving school performance contracts.", "improving fiscal performance contracts.", "improving financial performance contracts."
"improving poor performance targets." » "improving export performance targets.", "improving sector performance targets.", "improving _ performance targets.", "improving power performance targets.", "improving food performance targets.", "improving indoor performance targets."

Try widening your search to All Fields.

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