Perhaps you should try some spelling variations:
"Improving contract performance evidence." » "Improving country performance evidence.", "Improving court performance evidence.", "Improving corporate performance evidence."
improving contract » improve contract, improving central, improving coverage
"improving loan performance series." » "improving loan performance metrics.", "improving loan performance reviews.", "improving loan performance review.", "improving poor performance series.", "improving bank performance series.", "improving _ performance series.", "improving local performance series.", "improving land performance series.", "improving road performance series."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("Improving contract performance evidence.") or ("improving loan performance series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Improving contract performance evidence.") OR ("improving loan performance series.")).
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