Perhaps you should try some spelling variations:
"firm management controls." » "firm management control.", "firm management contract.", "firm management tools.", "farm management controls.", "city management controls.", "care management controls."
"land management activity." » "land management activities.", "land management facility.", "land management authority.", "land management _ctivity."
"waste management case." » "debt management case."
"asset management contracts." » "debt management contracts."
"fire management a." » "side management a.", "case management a.", "city management a.", "fire management _."
"zone management a." » "bank management a.", "case management a.", "change management a.", "zone management _."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("asset management contracts.") or ((("land management capacity.") or ("land management activity."))))) or ((((((("chain management issues.") OR ("cash management issues."))) or ("waste management case."))) or ((("fire management a.") or ("zone management a."))))))) or ("firm management controls."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("asset management contracts.") OR ((("land management capacity.") OR ("land management activity."))))) OR ((((((("chain management issues.") OR ("cash management issues."))) OR ("waste management case."))) OR ((("fire management a.") OR ("zone management a."))))))) OR ("firm management controls."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"asset management contracts.\") or (((\"land management capacity.\") or (\"land management activity.\"))))) or (((((((\"chain management issues.\") OR (\"cash management issues.\"))) or (\"waste management case.\"))) or (((\"fire management a.\") or (\"zone management a.\"))))))) or (\"firm management controls.\"))*".
• Removing quotes may allow a broader search: (((((( asset management contracts. ) or ((( land management capacity. ) or ( land management activity. ))))) or ((((((( chain management issues. ) OR ( cash management issues. ))) or ( waste management case. ))) or ((( fire management a. ) or ( zone management a. ))))))) or ( firm management controls. ))*.