Perhaps you should try some spelling variations:
"improving contract performance contract." » "improving country performance contract.", "improving court performance contract.", "improving economic performance contract.", "improving contract performance contracts.", "improve contract performance contract.", "improving central performance contract.", "improve contrast performance contract."
"improving bond performance reviews." » "improving bond performance review.", "improving bond performance reports.", "improving bond performance risks.", "improving board performance reviews.", "improving fund performance reviews.", "improving good performance reviews.", "improving blood performance reviews.", "improving food performance reviews.", "improving beef performance reviews."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving contract performance contract.") or ("improving bond performance reviews."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving contract performance contract.") OR ("improving bond performance reviews.")).
• Removing quotes may allow a broader search: (( improving contract performance contract. ) or ( improving bond performance reviews. )).
• Adding a wildcard symbol may retrieve word variants: (("improving contract performance contract.") or ("improving bond performance reviews."))*.