Perhaps you should try some spelling variations:
"measuring environmental and operational conditions" » "managing environmental and operational conditions", "monitoring environmental and operational conditions", "changing environmental and operational conditions", "measuring environmental and operating conditions", "measuring environmental and operational considerations", "measuring environmental and operational definitions"
"improving environmental and operational conditions" » "managing environmental and operational conditions", "improving environmental and operating conditions", "improving environmental and operational considerations", "improving environmental and operational definitions"
"during environmental and operational conditions" » "during environmental and operating conditions", "during environmental and operational considerations", "during environmental and operational definitions", "defining environmental and operational conditions", "addressing environmental and operational conditions", "exploring environmental and operational conditions"
"emerging environmental and operational conditions" » "emerging environmental and operating conditions", "emerging environmental and operational considerations", "emerging environmental and operational definitions", "managing environmental and operational conditions", "changing environmental and operational conditions", "assessing environmental and operational conditions"

Try widening your search to All Fields.

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: (((("during environmental and operational conditions") OR ("measuring environmental and operational conditions"))) OR ((("emerging environmental and operational conditions") OR ("improving environmental and operational conditions")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"during environmental and operational conditions\") OR (\"measuring environmental and operational conditions\"))) or (((\"emerging environmental and operational conditions\") or (\"improving environmental and operational conditions\"))))".
• Removing quotes may allow a broader search: (((( during environmental and operational conditions ) OR ( measuring environmental and operational conditions ))) or ((( emerging environmental and operational conditions ) or ( improving environmental and operational conditions )))).
• Adding a wildcard symbol may retrieve word variants: (((("during environmental and operational conditions") OR ("measuring environmental and operational conditions"))) or ((("emerging environmental and operational conditions") or ("improving environmental and operational conditions"))))*.