Perhaps you should try some spelling variations:
"modified seird optimization algorithms" » "modified seird optimisation algorithm", "modified seird estimation algorithms", "modified seird estimation algorithm", "modified stage optimization algorithms", "modified network optimization algorithms", "modified near optimization algorithms"
"modified notion optimized algorithm" » "modified notion optimized algorithms", "modified notion optimizer algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion optimized algorithm") OR ("modified seird optimization algorithms"))~.
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