Perhaps you should try some spelling variations:
"oxford management control." » "reform management control.", "records management control.", "flood management control."
"farm management concepts." » "cash management concepts.", "bank management concepts.", "data management concepts."
"firm management reform." » "fire management reform.", "city management reform.", "care management reform."
"fund management contracts." » "land management contracts.", "demand management contracts."

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: (((("farm management concepts.") OR ("firm management reform."))) OR ((("oxford management control.") OR ("fund management contracts."))))~.
• Removing quotes may allow a broader search: (((( farm management concepts. ) or ( firm management reform. ))) or ((( oxford management control. ) or ( fund management contracts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("farm management concepts.") or ("firm management reform."))) or ((("oxford management control.") or ("fund management contracts."))))*.