Perhaps you should try some spelling variations:
"legal investment performance series." » "legal government performance series.", "legal investment performance studies.", "legal investment performance size.", "real investment performance series.", "local investment performance series.", "global investment performance series."
"legal environmental performance reviews." » "legal environment performance reviews.", "legal environments performance reviews.", "local environmental performance reviews.", "legal environmental performance review.", "legal environmental performance reports.", "legal environmental performance risks."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("legal investment performance series.") or ("legal environmental performance reviews."))~.
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