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

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