Perhaps you should try some spelling variations:
"improving country performance review." » "improving country performance risk.", "improving country performance evidence.", "improving voluntary performance review.", "importing country performance review.", "borrowing country performance review."
"improving indoor performance series." » "improving poor performance series.", "improving donor performance series.", "improving india performance series.", "improving indoor performance metrics.", "improving indoor performance reviews.", "improving indoor performance targets.", "improving india's performance series.", "improving food performance series.", "improving gender performance series."

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 country performance review.") or ("improving indoor performance series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving country performance review.") OR ("improving indoor performance series.")).
• Removing quotes may allow a broader search: (( improving country performance review. ) or ( improving indoor performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("improving country performance review.") or ("improving indoor performance series."))*.