Perhaps you should try some spelling variations:
"land management controls." » "land management contract.", "land management tools.", "land management functions."
"oxford management control." » "reform management control.", "records management control.", "fund management control."
"flood management contracts." » "fund management contracts."
"firm management concepts." » "fire management concepts.", "city management concepts.", "care management concepts."
"farm management contracts." » "cash management contracts.", "bank management contracts.", "data management contracts."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("firm management concepts.") or ((((("land management controls.") or ("oxford management control."))) or ((("farm management contracts.") or ("flood management contracts."))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("firm management concepts.") OR ((((("land management controls.") OR ("oxford management control."))) OR ((("farm management contracts.") OR ("flood management contracts.")))))).
• Removing quotes may allow a broader search: (( firm management concepts. ) or ((((( land management controls. ) or ( oxford management control. ))) or ((( farm management contracts. ) or ( flood management contracts. )))))).
• Adding a wildcard symbol may retrieve word variants: (("firm management concepts.") or ((((("land management controls.") or ("oxford management control."))) or ((("farm management contracts.") or ("flood management contracts."))))))*.