Perhaps you should try some spelling variations:
"emerging export performance series." » "emerging export performance studies.", "emerging export performance size.", "leveraging export performance series.", "emerging empire performance series.", "emerging empires performance series."
"improving co performance measures." » "improving ceo performance measures.", "improving do performance measures.", "improving core performance measures.", "improving eco performance measures.", "improving crop performance measures.", "improving ict 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: (("emerging export performance series.") or ("improving co performance measures."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("emerging export performance series.") OR ("improving co performance measures.")).
• Removing quotes may allow a broader search: (( emerging export performance series. ) or ( improving co performance measures. )).
• Adding a wildcard symbol may retrieve word variants: (("emerging export performance series.") or ("improving co performance measures."))*.