Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"
"modified total estimation algorithmss" » "modified total estimation algorithms", "modified total estimation algorithm", "modified total optimization algorithms", "modified motion estimation algorithmss", "modified pose estimation algorithmss", "modified total variation algorithmss", "modified thermal estimation algorithmss", "modified ti6al4v estimation algorithmss"

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