Perhaps you should try some spelling variations:
"improving thermal performances based." » "improving thermal performance based.", "improving team performances based.", "improving sharia performances based.", "improving thermal performance case.", "improving thermal performances de.", "improving external performances based.", "improving animal performances based.", "improving erm performances based."
"improving urban performance series." » "improving urban performance studies.", "improving urban performance size.", "improving bank performance series.", "improving loan performance series.", "improving human performance series."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("improving urban performance series.") or ("improving thermal performances based."))~.
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