Perhaps you should try some spelling variations:
"improving road performance metrics." » "improving road performance measures.", "improving board performance metrics.", "improving good performance metrics.", "improving bond performance metrics.", "improving food performance metrics.", "improving rural performance metrics."
"improving land performance series." » "improving land performance studies.", "improving land performance size.", "improving plant performance series.", "improving fund performance series.", "improving und performance series."

You may be able to get more results by adjusting your search query.

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