Perhaps you should try some spelling variations:
performance metrics » performance measures
company performance » country performance
plant performance » port performance, court performance
improving company » improve company, improving compliance, improving community
improved plant » improved land, improves implant, improved infant

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

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