Perhaps you should try some spelling variations:
"Improving country performance metrics." » "Improving country performance contracts.", "Improving country performance measures.", "Improving country performance contract."
"improving thermal performance metrics." » "improving thermal performance contracts.", "improving thermal performance measures.", "improving thermal performance contract.", "improving maternal performance metrics.", "improving rural performance metrics.", "improving human performance metrics."
improving country » improving voluntary, importing country, borrowing country

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Improving country performance metrics.") OR ("improving thermal performance metrics."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Improving country performance metrics.\") OR (\"improving thermal performance metrics.\"))".
• Removing quotes may allow a broader search: (( Improving country performance metrics. ) OR ( improving thermal performance metrics. )).
• Adding a wildcard symbol may retrieve word variants: (("Improving country performance metrics.") OR ("improving thermal performance metrics."))*.