Perhaps you should try some spelling variations:
"modified optimal optimization algorithms" » "modified optimal optimisation algorithm", "modified optimal estimation algorithms", "modified optimal estimation algorithm", "modified optimal optimisation algorithms", "modified optimal estimation algorithmss", "modified geometrical optimization algorithms", "modified global optimization algorithms", "modified thermal optimization algorithms"
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimisation algorithm", "modified objective estimation algorithm", "modified objective estimation algorithms"

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