Perhaps you should try some spelling variations:
"fund management concepts." » "fund management contracts.", "land management concepts."
"demand management concepts." » "demand management contracts.", "land management concepts.", "debt management concepts."
"farm management control." » "farm management contracts.", "cash management control.", "bank management control.", "data management control."
"reform management control." » "reform management contracts.", "firm management control."

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