Perhaps you should try some spelling variations:
"several complex variables and analytics stages" » "several complex variables and analytics state", "several complex variables and analysis stages", "several complex variables and analytics images"
"several complex variables and analysis space" » "several complex variables and analysis scale", "several complex variables and analysis surface", "several complex variables and analysis speech"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("several complex variables and analytics stages") OR ("several complex variables and analytic spaces"))) OR ("several complex variables and analysis space")).
• Removing quotes may allow a broader search: (((( several complex variables and analytics stages ) or ( several complex variables and analytic spaces ))) or ( several complex variables and analysis space )).
• Adding a wildcard symbol may retrieve word variants: (((("several complex variables and analytics stages") or ("several complex variables and analytic spaces"))) or ("several complex variables and analysis space"))*.