Perhaps you should try some spelling variations:
"global environment performance series." » "global environmental performances series.", "global government performance series.", "global investment performance series.", "global environment performance studies.", "global environment performance size."
"coal environmental performance reviews." » "coal environmental performance review.", "coal environmental performance reports.", "coal environmental performance risks.", "local environmental performance reviews.", "global environmental performance reviews.", "social environmental 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: (("global environment performance series.") or ("coal environmental performance reviews."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("global environment performance series.") OR ("coal environmental performance reviews."))*.
• Removing quotes may allow a broader search: (( global environment performance series. ) or ( coal environmental performance reviews. ))*.