Perhaps you should try some spelling variations:
"crop management quality." » "crop management capacity.", "case management quality.", "crisis management quality.", "flood management quality."
"demand management tools." » "land management tools.", "debt management tools."
"reform management concepts." » "firm management concepts."
"cash management based." » "cash management board.", "cash management issues.", "cash management data.", "asset management based."
"care management contracts." » "case management contracts.", "fire management contracts.", "change management contracts."
"cash management a." » "asset management a.", "cash management _."
"farm management concepts." » "bank management concepts.", "data management concepts.", "forest management concepts."

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: (((("crop management quality.") OR ((("care management contracts.") OR ((((((("cash management based.") OR ("cash management a."))) OR ("chain management case."))) OR ("demand management tools."))))))) OR ((("reform management concepts.") OR ("farm management concepts."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"crop management quality.\") or (((\"care management contracts.\") or (((((((\"cash management based.\") or (\"cash management a.\"))) or (\"chain management case.\"))) or (\"demand management tools.\"))))))) or (((\"reform management concepts.\") OR (\"farm management concepts.\"))))~".
• Removing quotes may allow a broader search: (((( crop management quality. ) or ((( care management contracts. ) or ((((((( cash management based. ) or ( cash management a. ))) or ( chain management case. ))) or ( demand management tools. ))))))) or ((( reform management concepts. ) OR ( farm management concepts. ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("crop management quality.") or ((("care management contracts.") or ((((((("cash management based.") or ("cash management a."))) or ("chain management case."))) or ("demand management tools."))))))) or ((("reform management concepts.") OR ("farm management concepts."))))*.