Perhaps you should try some spelling variations:
performance review » performance risk, performance evidence
larval performance » level performance, thermal performance, maximal performance
poor performance » sector performance
improving larval » improving local, improving legal, improving land
improving poor » improving power, improving food, improving peer
reports. » report.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( improving poor performance review. ) or ( improving larval performance reports. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( improving poor performance review. ) OR ( improving larval performance reports. )).
• Adding a wildcard symbol may retrieve word variants: (( improving poor performance review. ) or ( improving larval performance reports. ))*.