Perhaps you should try some spelling variations:
"improving road performance review." » "improving road performance risk.", "improving road performance evidence.", "improving board performance review.", "improving good performance review.", "improving bond performance review.", "improving food performance review.", "improving rural performance review."
"improving do performance measures." » "improving di performance measures.", "improving 2 performance measures.", "improving 3 performance measures.", "improving co performance measures.", "improving eco performance measures.", "improving pro performance measures."

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

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