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 estimation algorithmss" » "modified caging estimation algorithm", "modified caging optimization algorithms", "modified caging estimation algorithms", "modified caging optimization algorithmss", "modified caging optimisation algorithms", "modified lighting estimation algorithmss"

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