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

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