Perhaps you should try some spelling variations:
"oxford management concepts." » "oxford management contracts.", "reform management concepts.", "records management concepts.", "flood management concepts."
"fund management reviews." » "fund management review.", "fund management overview.", "fund management reports.", "land management reviews."
"oxford management control." » "oxford management contracts.", "reform management control.", "records management control.", "flood management control."
"demand management reform." » "land management reform.", "debt management reform."
"oxford management case." » "reform management case.", "records management case.", "flood management case.", "oxford management a."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("demand management reform.") or ("fund management reviews."))) or ((((("oxford management concepts.") or ("oxford management case."))) or ("oxford management control."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("demand management reform.") OR ("fund management reviews."))) OR ((((("oxford management concepts.") OR ("oxford management case."))) OR ("oxford management control.")))).
• Removing quotes may allow a broader search: (((( demand management reform. ) or ( fund management reviews. ))) or ((((( oxford management concepts. ) or ( oxford management case. ))) or ( oxford management control. )))).
• Adding a wildcard symbol may retrieve word variants: (((("demand management reform.") or ("fund management reviews."))) or ((((("oxford management concepts.") or ("oxford management case."))) or ("oxford management control."))))*.