Perhaps you should try some spelling variations:
"modified objective optimization algorithmssss" » "modified objective optimisation algorithm", "modified objective optimisation algorithmsss", "modified objective estimation algorithmssss", "modified objective estimation algorithmsss", "modified multiobjective optimization algorithmssss"
"modified caging optimization algorithms" » "modified caging optimisation algorithm", "modified caging estimation algorithms", "modified caging estimation algorithm", "modified staffing optimization algorithms"

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