Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified caging evolutionary algorithm" » "modified caging evolution algorithm", "modified caging solution algorithm", "modified aging evolutionary algorithm", "modified changing evolutionary algorithm", "modified charging evolutionary algorithm"

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• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithms ) OR ( modified caging evolutionary algorithm ))~.
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