Perhaps you should try some spelling variations:
performance series » performance studies, performance size
global performance » total performance, regional performance, general performance
macro performance » crop performance, ceo performance, machine performance
improving global » improving fiscal, improving growth, providing global
improving macro » improving air, improving care, improving co

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

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