Perhaps you should try some spelling variations:
"improving company performance series." » "improving country performance series.", "improving company performance studies.", "improving company performance size.", "improve company performance series.", "improving compliance performance series.", "improving community performance series."
"Improving loan performance review." » "Improving loan performance risk.", "Improving loan performance evidence."
improving loan » improving local, improving land, improving lead

Try widening your search to All Fields.

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