Perhaps you should try some spelling variations:
"improving indoor performance metrics." » "improving indoor performance measures.", "improving outdoor performance metrics.", "improving poor performance metrics.", "improving donor performance metrics.", "improving india's performance metrics.", "improving food performance metrics."
"improving gender performance metrics." » "improving gender performance measures.", "improving gendered performance metrics.", "improving center performance metrics.", "improving under performance metrics.", "improving energy performance metrics."

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 metrics.") OR ("improving gender performance metrics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving indoor performance metrics.\") OR (\"improving gender performance metrics.\"))".
• Removing quotes may allow a broader search: (( improving indoor performance metrics. ) OR ( improving gender performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("improving indoor performance metrics.") OR ("improving gender performance metrics."))*.