Perhaps you should try some spelling variations:
"demand management functions." » "demand management operations.", "demand management practices.", "demand management education.", "land management functions.", "debt management functions."
"oxford management tools." » "records management tools.", "fund management tools.", "flood management tools."
"oxford management concepts." » "records management concepts.", "fund management concepts.", "flood management concepts."
"reform management tools." » "farm management tools."
"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: (((("demand management functions.") OR ((("oxford management tools.") OR ("reform management tools."))))) OR ((("oxford management concepts.") OR ("firm management contracts."))))~.
• Removing quotes may allow a broader search: (((( demand management functions. ) or ((( oxford management tools. ) or ( reform management tools. ))))) or ((( oxford management concepts. ) or ( firm management contracts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("demand management functions.") or ((("oxford management tools.") or ("reform management tools."))))) or ((("oxford management concepts.") or ("firm management contracts."))))*.