Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm", "modified multiobjective approximation algorithms"
"modified motion optimization algorithms" » "modified motion optimisation algorithm", "modified motion estimation algorithm", "modified motion optimized algorithms", "modified motion estimation algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"

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