Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
modified charging » modified caging, modified carbon
model algorithm » mom algorithm
charging model » learning model

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified objective optimization algorithm ) or ( modified charging model algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective optimization algorithm ) OR ( modified charging model algorithm )).
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