Perhaps you should try some spelling variations:
"land management controls." » "land management contract.", "land management tools.", "land management concepts."
"reform management control." » "farm management control.", "firm management control."
"oxford management contracts." » "records management contracts.", "fund management contracts.", "farm management contracts."
"flood management contracts." » "fund management contracts."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("reform management control.") or ((((("oxford management contracts.") OR ("flood management contracts."))) or ("land management controls."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("reform management control.") OR ((((("oxford management contracts.") OR ("flood management contracts."))) OR ("land management controls.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"reform management control.\") or (((((\"oxford management contracts.\") OR (\"flood management contracts.\"))) or (\"land management controls.\"))))".
• Removing quotes may allow a broader search: (( reform management control. ) or ((((( oxford management contracts. ) OR ( flood management contracts. ))) or ( land management controls. )))).
• Adding a wildcard symbol may retrieve word variants: (("reform management control.") or ((((("oxford management contracts.") OR ("flood management contracts."))) or ("land management controls."))))*.