Perhaps you should try some spelling variations:
"functions based using tools" » "functions based nursing tools", "functions gases using tools", "functions based testing tools", "function based using tools"
"deim based using tools" » "deim based nursing tools", "deim gases using tools", "deim based testing tools", "design based using tools"
"device based using tools" » "device based nursing tools", "device gases using tools", "device based testing tools"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("functions based using tools") OR ((("deim based using tools") OR ("device based using tools"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"functions based using tools\") OR (((\"deim based using tools\") OR (\"device based using tools\"))))".
• Removing quotes may allow a broader search: (( functions based using tools ) OR ((( deim based using tools ) OR ( device based using tools )))).
• Adding a wildcard symbol may retrieve word variants: (("functions based using tools") OR ((("deim based using tools") OR ("device based using tools"))))*.