Perhaps you should try some spelling variations:
"case management activity." » "case management activities.", "case management facility.", "case management authority.", "change management activity.", "asset management activity.", "chain management activity.", "case management _ctivity."
"demand management control." » "land management control."
"reform management concepts." » "farm management concepts.", "firm management concepts."
"basin management case." » "chain management case.", "business management case.", "crisis management case."
"cash management from." » "asset management from."
"cash management a." » "asset management a.", "cash 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: (((("case management activity.") OR ((((("waste management contracts.") OR ("debt management contracts."))) OR ((((((("cash management from.") OR ("cash management a."))) OR ("basin management case."))) OR ("demand management control."))))))) OR ("reform management concepts."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"case management activity.\") or (((((\"waste management contracts.\") OR (\"debt management contracts.\"))) or (((((((\"cash management from.\") or (\"cash management a.\"))) or (\"basin management case.\"))) or (\"demand management control.\"))))))) or (\"reform management concepts.\"))~".
• Removing quotes may allow a broader search: (((( case management activity. ) or ((((( waste management contracts. ) OR ( debt management contracts. ))) or ((((((( cash management from. ) or ( cash management a. ))) or ( basin management case. ))) or ( demand management control. ))))))) or ( reform management concepts. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("case management activity.") or ((((("waste management contracts.") OR ("debt management contracts."))) or ((((((("cash management from.") or ("cash management a."))) or ("basin management case."))) or ("demand management control."))))))) or ("reform management concepts."))*.