Perhaps you should try some spelling variations:
"fishery management concepts." » "fisheries management concepts.", "fiscal management concepts."
"demand management _." » "land management _.", "debt management _."
"waste management entity." » "waste management energy.", "waste management activity.", "waste management quality.", "debt management entity."
"cash management water." » "cash management data.", "cash management based.", "cash management areas.", "asset management water."
"firm management case." » "farm management case.", "fire management case.", "city management case."
"firm management a." » "farm management a.", "fire management a.", "city management a."
"crop management issues." » "case management issues.", "crisis management issues.", "flood management issues."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((((((((("firm management case.") OR ("firm management a."))) or ("crop management issues."))) or ("fishery management concepts."))) or ("waste management entity."))) or ((("demand management _.") or ("cash management water."))))) or ("chain management contracts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((((((("firm management case.") OR ("firm management a."))) OR ("crop management issues."))) OR ("fishery management concepts."))) OR ("waste management entity."))) OR ((("demand management _.") OR ("cash management water."))))) OR ("chain management contracts.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((((((\"firm management case.\") OR (\"firm management a.\"))) or (\"crop management issues.\"))) or (\"fishery management concepts.\"))) or (\"waste management entity.\"))) or (((\"demand management _.\") or (\"cash management water.\"))))) or (\"chain management contracts.\"))".
• Removing quotes may allow a broader search: (((((((((((( firm management case. ) OR ( firm management a. ))) or ( crop management issues. ))) or ( fishery management concepts. ))) or ( waste management entity. ))) or ((( demand management _. ) or ( cash management water. ))))) or ( chain management contracts. )).
• Adding a wildcard symbol may retrieve word variants: (((((((((((("firm management case.") OR ("firm management a."))) or ("crop management issues."))) or ("fishery management concepts."))) or ("waste management entity."))) or ((("demand management _.") or ("cash management water."))))) or ("chain management contracts."))*.