Perhaps you should try some spelling variations:
"modified changing optimizer algorithms" » "modified changing optimized algorithms", "modified changing optimized algorithm", "modified changing optimization algorithms", "modified choosing optimizer algorithms", "modified caging optimizer algorithms"
"modified objective solution algorithm" » "modified objective evolutionary algorithm", "modified objective allocation algorithm", "modified objective evolution algorithm", "modified objective convolution algorithms"

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