Perhaps you should try some spelling variations:
"improving power performance metrics." » "improving power performance contracts.", "improving power performance contract.", "improving poor performance metrics.", "improving worker performance metrics.", "improving low performance metrics.", "improving poverty performance metrics.", "improving water performance metrics.", "improving upper performance metrics."
"improving indoor performance measures." » "improving poor performance measures.", "improving donor performance measures.", "improving india performance measures.", "improving india's performance measures.", "improving food performance measures.", "improving gender performance measures."

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

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