Perhaps you should try some spelling variations:
"modified notion optimization algorithmssssss" » "modified notion optimization algorithms", "modified notion optimisation algorithm", "modified notion optimization algorithmsssssss", "modified notion optimisation algorithmssssss", "modified notion estimation algorithmssssss", "modified network optimization algorithmssssss", "modified allocation optimization algorithmssssss"
"modified policy optimization algorithm" » "modified policy optimization algorithms", "modified policy optimisation algorithm", "modified policy estimation algorithm", "modified topology optimization algorithm"

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