Perhaps you should try some spelling variations:
"city management based." » "city management case.", "city management board.", "city management issues.", "security management based.", "facility management based.", "quality management based."
"crop management based." » "crop management case.", "crop management board.", "crop management issues.", "crisis management based.", "flood management based."
"asset management concepts." » "debt management concepts."
"data management a." » "debt management a.", "bank management a.", "demand management a.", "data management _."
"case management data." » "case management case.", "waste management data.", "change management data.", "basin management data."
"cash management data." » "cash management case."
"fire management contracts." » "side management contracts.", "zone management contracts.", "finance management contracts."

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

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