Perhaps you should try some spelling variations:
"flood management activity." » "flood management activities.", "flood management facility.", "flood management authority.", "land management activity.", "fund management activity."
"basin management control." » "chain management control.", "crisis management control.", "asset management control."
"farm management water." » "farm management case.", "farm management data.", "farm management a.", "bank management water.", "data management water.", "forest management water."
"cash management based." » "cash management case.", "cash management board.", "cash management issues.", "asset management based."
"firm management tools." » "fire management tools.", "city management tools.", "care management tools."

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: (((((((((("risk management control.") OR ("risk management contracts."))) OR ((("basin management control.") OR ("business management control."))))) OR ("flood management activity."))) OR ((("farm management water.") OR ("cash management based."))))) OR ("firm management tools."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((((\"risk management control.\") or (\"risk management contracts.\"))) or (((\"basin management control.\") OR (\"business management control.\"))))) or (\"flood management activity.\"))) or (((\"farm management water.\") or (\"cash management based.\"))))) or (\"firm management tools.\"))~".
• Removing quotes may allow a broader search: (((((((((( risk management control. ) or ( risk management contracts. ))) or ((( basin management control. ) OR ( business management control. ))))) or ( flood management activity. ))) or ((( farm management water. ) or ( cash management based. ))))) or ( firm management tools. ))~.
• Adding a wildcard symbol may retrieve word variants: (((((((((("risk management control.") or ("risk management contracts."))) or ((("basin management control.") OR ("business management control."))))) or ("flood management activity."))) or ((("farm management water.") or ("cash management based."))))) or ("firm management tools."))*.