Perhaps you should try some spelling variations:
"several complex variables and analytics spaces" » "several complex variables and analytic space", "several complex variables and analysis spaces", "several complex variables and analytics stages"
"several complex variables and analysis speech" » "several complex variables and analysis special"

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