Perhaps you should try some spelling variations:
"modified invasive optimization algorithms" » "modified invasive optimisation algorithm", "modified invasive estimation algorithms", "modified invasive estimation algorithm", "modified invasive optimisation algorithms", "modified invasive estimation algorithmss", "modified passive optimization algorithms"
"modified caging optimization algorithm" » "modified caging optimisation algorithm", "modified caging estimation algorithm", "modified caging estimation algorithms", "modified staffing optimization algorithm"

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