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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimization algorithms\") OR (\"modified charging optimized algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective optimization algorithms ) OR ( modified charging optimized algorithms ))~.
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