Perhaps you should try some spelling variations:
"reform management concepts." » "reform management contracts.", "farm management concepts.", "firm management concepts."
"fund management concepts." » "fund management contracts.", "land management concepts.", "demand management concepts."
"oxford management based." » "records management based.", "farm management based.", "road management based.", "oxford management case.", "oxford management board.", "oxford management issues."
"flood management based." » "flood management case.", "flood management board.", "flood management issues.", "land management based."

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: (((("oxford management based.") OR ("flood management based."))) OR ((("reform management concepts.") OR ("fund management concepts."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oxford management based.\") OR (\"flood management based.\"))) or (((\"reform management concepts.\") or (\"fund management concepts.\"))))~".
• Removing quotes may allow a broader search: (((( oxford management based. ) OR ( flood management based. ))) or ((( reform management concepts. ) or ( fund management concepts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("oxford management based.") OR ("flood management based."))) or ((("reform management concepts.") or ("fund management concepts."))))*.