Perhaps you should try some spelling variations:
"demand management reports." » "demand management reform.", "debt management reports."
"fund management centers." » "fund management concepts.", "fund management controls.", "fund management water."
"land management centers." » "land management concepts.", "land management controls.", "land management water."
"oxford management control." » "oxford management contracts.", "reform management control.", "records management control.", "flood management control."

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("demand management reports.") or ((("fund management centers.") OR ("land management centers."))))) or ("oxford management control."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("demand management reports.") OR ((("fund management centers.") OR ("land management centers."))))) OR ("oxford management control.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"demand management reports.\") or (((\"fund management centers.\") OR (\"land management centers.\"))))) or (\"oxford management control.\"))".
• Removing quotes may allow a broader search: (((( demand management reports. ) or ((( fund management centers. ) OR ( land management centers. ))))) or ( oxford management control. )).
• Adding a wildcard symbol may retrieve word variants: (((("demand management reports.") or ((("fund management centers.") OR ("land management centers."))))) or ("oxford management control."))*.