Perhaps you should try some spelling variations:
"farm management controls." » "farm management control.", "farm management contract.", "farm management tools.", "cash management controls.", "bank management controls.", "data management controls."
"oxford management review." » "reform management review.", "records management review.", "road management review."
"demand management data." » "debt management data.", "demand management case."
"land management water." » "land management case.", "land management based.", "land management areas."
"farm management contracts." » "cash management contracts.", "bank management contracts.", "data management contracts."
"firm management a." » "fire management a.", "city management a.", "care management a.", "firm management _."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("oxford management review.") OR ("fund management reform."))) OR ((((((((("farm management controls.") OR ("farm management contracts."))) OR ("land management water."))) OR ((("firm management a.") OR ("demand management data."))))) OR ("flood management concepts."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oxford management review.\") or (\"fund management reform.\"))) or (((((((((\"farm management controls.\") OR (\"farm management contracts.\"))) or (\"land management water.\"))) or (((\"firm management a.\") or (\"demand management data.\"))))) or (\"flood management concepts.\"))))~".
• Removing quotes may allow a broader search: (((( oxford management review. ) or ( fund management reform. ))) or ((((((((( farm management controls. ) OR ( farm management contracts. ))) or ( land management water. ))) or ((( firm management a. ) or ( demand management data. ))))) or ( flood management concepts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("oxford management review.") or ("fund management reform."))) or ((((((((("farm management controls.") OR ("farm management contracts."))) or ("land management water."))) or ((("firm management a.") or ("demand management data."))))) or ("flood management concepts."))))*.