Perhaps you should try some spelling variations:
"local governments performance series." » "local government's performance series.", "local government performance series.", "local governance performance series.", "local governments performance studies.", "local governments performance size."
"legal environment performance contract." » "legal environmental performance contract.", "legal environmental performances contract.", "legal government performance contract.", "legal environment performance contracts.", "global environment performance contract."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("local governments performance series.") OR ("legal environment performance contract."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"local governments performance series.\") OR (\"legal environment performance contract.\"))*".
• Removing quotes may allow a broader search: (( local governments performance series. ) OR ( legal environment performance contract. ))*.