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 based estimation algorithms" » "modified based estimation algorithm", "modified based optimization algorithms", "modified based approximation algorithms", "modified pose estimation algorithms", "modified based investigation algorithms", "modified pulses estimation algorithms", "modified male estimation algorithms"

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