Perhaps you should try some spelling variations:
"waste management controls." » "waste management contract.", "waste management tools.", "waste management functions."
"finance management concepts." » "financial management concepts."
"asset management water." » "asset management case.", "asset management based.", "asset management areas."
"case management control." » "cash management control.", "change management control.", "chain management control."
"debt management data." » "debt management case."
"asset management a." » "asset management _."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("waste management controls.") or ("case management control."))) or ((((((("asset management water.") OR ("asset management a."))) or ("debt management data."))) or ("land management contracts."))))) or ("finance management concepts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("waste management controls.") OR ("case management control."))) OR ((((((("asset management water.") OR ("asset management a."))) OR ("debt management data."))) OR ("land management contracts."))))) OR ("finance management concepts."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"waste management controls.\") or (\"case management control.\"))) or (((((((\"asset management water.\") OR (\"asset management a.\"))) or (\"debt management data.\"))) or (\"land management contracts.\"))))) or (\"finance management concepts.\"))*".
• Removing quotes may allow a broader search: (((((( waste management controls. ) or ( case management control. ))) or ((((((( asset management water. ) OR ( asset management a. ))) or ( debt management data. ))) or ( land management contracts. ))))) or ( finance management concepts. ))*.