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

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