Perhaps you should try some spelling variations:
"land management controls." » "land management control.", "land management contract.", "land management tools."
"oxford management review." » "records management review.", "farm management review.", "road management review.", "oxford management reform."
"reform management _." » "farm management _."
"demand management data." » "debt management data.", "demand management a.", "demand management case."
"firm management contracts." » "farm management contracts.", "fire management contracts.", "city 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: (("oxford management review.") OR ((((((("firm management contracts.") OR ("land management controls."))) OR ((("reform management _.") OR ("demand management data."))))) OR ((("flood management concepts.") OR ("fund management concepts."))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"oxford management review.\") or (((((((\"firm management contracts.\") or (\"land management controls.\"))) or (((\"reform management _.\") or (\"demand management data.\"))))) or (((\"flood management concepts.\") OR (\"fund management concepts.\"))))))~".
• Removing quotes may allow a broader search: (( oxford management review. ) or ((((((( firm management contracts. ) or ( land management controls. ))) or ((( reform management _. ) or ( demand management data. ))))) or ((( flood management concepts. ) OR ( fund management concepts. ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("oxford management review.") or ((((((("firm management contracts.") or ("land management controls."))) or ((("reform management _.") or ("demand management data."))))) or ((("flood management concepts.") OR ("fund management concepts."))))))*.