Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified mild solution algorithm" » "modified mild evolution algorithm", "modified mild convolution algorithms", "modified mild evolutionary algorithm", "modified male solution algorithm", "modified seird solution algorithm", "modified bi1 solution algorithm", "modified mild solutions algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimization algorithm") OR ("modified mild solution algorithm")).
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