Perhaps you should try some spelling variations:
"modified choosing optimisation algorithm" » "modified choosing optimization algorithms", "modified choosing estimation algorithm", "modified caging optimisation algorithm"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective approximation algorithms", "modified objective allocation algorithms"

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