Perhaps you should try some spelling variations:
"land management controls." » "land management contract.", "land management tools.", "land management concepts."
"oxford management reviews." » "oxford management review.", "oxford management overview.", "oxford management reports.", "reform management reviews.", "records management reviews.", "fund management reviews."
"land management centers." » "land management concepts.", "land management water.", "land management energy."
"oxford management reform." » "reform management reform.", "records management reform.", "fund management reform."

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

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