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."
"reform management tools." » "firm management tools."
"city management water." » "city management based.", "city management a.", "city management areas.", "case management water.", "crop management water.", "security management water."
"data management case." » "bank management case.", "demand management case.", "chain management case.", "data management a."
"debt management case." » "debt management a."
"farm management data." » "bank management data.", "forest management data.", "chain management data.", "farm management a."

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