Perhaps you should try some spelling variations:
"land management activity." » "land management activities.", "land management facility.", "land management authority.", "land management _ctivity."
"land management quality." » "land management capacity."
"reform management contract." » "farm management contract."
"reform management contracts." » "farm management contracts."
"case management water." » "case management case.", "case management data.", "case management based.", "waste management water.", "change management water.", "asset management water."
"cash management control." » "asset management control."
"firm management a." » "farm management a.", "fire management a.", "city management a.", "firm management _."

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: (((((("cash management control.") OR ((("land management quality.") OR ("land management activity."))))) OR ((("case management water.") OR ("firm management a."))))) OR ((("reform management contract.") OR ("reform management contracts."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"cash management control.\") or (((\"land management quality.\") or (\"land management activity.\"))))) or (((\"case management water.\") or (\"firm management a.\"))))) or (((\"reform management contract.\") OR (\"reform management contracts.\"))))~".
• Removing quotes may allow a broader search: (((((( cash management control. ) or ((( land management quality. ) or ( land management activity. ))))) or ((( case management water. ) or ( firm management a. ))))) or ((( reform management contract. ) OR ( reform management contracts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((((("cash management control.") or ((("land management quality.") or ("land management activity."))))) or ((("case management water.") or ("firm management a."))))) or ((("reform management contract.") OR ("reform management contracts."))))*.