Perhaps you should try some spelling variations:
"modified stochastic configuration algorithm" » "modified stochastic optimization algorithm"
"modified response optimization algorithm" » "modified response optimization algorithms", "modified response optimisation algorithm", "modified response estimation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified stochastic configuration algorithm") OR ("modified response optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified stochastic configuration algorithm ) or ( modified response optimization algorithm ))~.
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