Perhaps you should try some spelling variations:
"improving power performance contract." » "improving power performance contracts.", "improving poor performance contract.", "improving worker performance contract.", "improving core performance contract.", "improving peer performance contract.", "improving sewer performance contract."
"improving export performance targets." » "improving exposure performance targets.", "improving eap performance targets.", "improving eco 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 export performance targets.") or ("improving power performance contract."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving export performance targets.") OR ("improving power performance contract."))*.
• Removing quotes may allow a broader search: (( improving export performance targets. ) or ( improving power performance contract. ))*.