Perhaps you should try some spelling variations:
"modified topology optimization algorithmss" » "modified topology optimisation algorithm", "modified topology estimation algorithms", "modified topology estimation algorithm", "modified topology optimisation algorithms", "modified topology estimation algorithmss"
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified objective estimation algorithm", "modified multiobjective optimization algorithms"

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