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

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