Perhaps you should try some spelling variations:
"flood management concepts." » "flood management contracts.", "land management concepts.", "fund management concepts."
"oxford management controls." » "oxford management contracts.", "oxford management tools.", "oxford management functions.", "oxford management contractss.", "records management controls.", "fund management controls.", "farm management controls."
"reform management controls." » "reform management contracts.", "reform management tools.", "reform management functions.", "reform management contractss.", "farm management controls.", "firm management controls."
"reform management contract." » "reform management contracts.", "farm management contract.", "firm management contract."
"oxford management control." » "oxford management contracts.", "records management control.", "fund management control.", "farm management control."

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