Perhaps you should try some spelling variations:
"oxford management concepts." » "oxford management contracts.", "records management concepts.", "flood management concepts.", "farm management concepts."
"land management controls." » "land management control.", "land management contracts.", "land management contract."
"fund management reviews." » "fund management review.", "fund management overview.", "fund management reports.", "demand management reviews."
"reform management energy." » "farm management energy.", "firm management energy.", "reform management entity.", "reform management centers.", "reform management agency."

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