Perhaps you should try some spelling variations:
"improving sectoral performance evidence." » "improving sector performance evidence.", "improving school performance evidence.", "improving social performance evidence.", "improving central performance evidence.", "improving mental performance evidence."
"improving poor performance metrics." » "improving poor performance contracts.", "improving poor performance measures.", "improving poor performance contract.", "improving export performance metrics.", "improving sector performance metrics.", "improving _ performance metrics.", "improving power performance metrics.", "improving food performance metrics.", "improving indoor performance metrics."

Try widening your search to All Fields.

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

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