Perhaps you should try some spelling variations:
"modified notion optimisation algorithm" » "modified notion optimization algorithms", "modified notion estimation algorithm", "modified notion estimation algorithms", "modified network optimization algorithm"
"modified optimal solution algorithm" » "modified optimal evolution algorithm", "modified optimal convolution algorithms", "modified optimal evolutionary algorithm", "modified thermal solution algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified optimal solution algorithm") OR ("modified notion optimisation algorithm"))~.
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