Perhaps you should try some spelling variations:
"improving overall performance contract." » "improving overall performance contracts.", "improving average performance contract.", "improving thermal performance contract.", "improving governance performance contract.", "improving coverage performance contract.", "improving federal performance contract.", "improving neural performance contract."
"improving rural performance targets." » "improving euract performance targets.", "improving larval performance targets.", "improving pupil performance targets."

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

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