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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified topology optimizer algorithms\") OR (\"modified multiobjective optimisation algorithm\"))~".
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