Perhaps you should try some spelling variations:
"modified notion optimization algorithmss" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified notion optimisation algorithms", "modified notion estimation algorithmss", "modified network optimization algorithmss", "modified policy optimization algorithmss", "modified allocation optimization algorithmss"
"modified staffing optimization algorithms" » "modified staffing optimisation algorithm", "modified staffing estimation algorithms", "modified staffing estimation algorithm", "modified caging optimization algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion optimization algorithmss") OR ("modified staffing optimization algorithms"))~.
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