Perhaps you should try some spelling variations:
"land management reviews." » "land management review.", "land management overview.", "land management reports."
"demand management reviews." » "demand management review.", "demand management overview.", "demand management reports.", "debt management reviews."
"oxford management case." » "reform management case.", "records management case.", "road management case.", "oxford management a."
"farm management water." » "farm management data.", "farm management based.", "farm management a.", "cash management water.", "bank management water.", "data management water."

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("land management reviews.") or ("demand management reviews."))) or ((((((("farm management water.") or ("fund management _."))) or ("oxford management case."))) or ("flood management contracts."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("land management reviews.") OR ("demand management reviews."))) OR ((((((("farm management water.") OR ("fund management _."))) OR ("oxford management case."))) OR ("flood management contracts.")))).
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• Adding a wildcard symbol may retrieve word variants: (((("land management reviews.") or ("demand management reviews."))) or ((((((("farm management water.") or ("fund management _."))) or ("oxford management case."))) or ("flood management contracts."))))*.