Perhaps you should try some spelling variations:
"modified allocation optimization algorithmss" » "modified allocation optimization algorithms", "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified allocation optimization algorithmsss", "modified allocation optimisation algorithmss", "modified allocation estimation algorithmss", "modified location optimization algorithmss"
"modified topology optimization algorithm" » "modified topology optimization algorithms", "modified topology optimisation algorithm", "modified topology estimation algorithm"

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