Perhaps you should try some spelling variations:
"modified objective allocation algorithms" » "modified objective estimation algorithms", "modified objective approximation algorithms"
"modified charging optimizer algorithms" » "modified charging optimized algorithms", "modified charging optimized algorithm", "modified charging optimization algorithms", "modified choosing optimizer algorithms", "modified caging optimizer algorithms", "modified carbon optimizer algorithms"

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