Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified pose estimation algorithms" » "modified pose optimization algorithms", "modified pose optimisation algorithm", "modified pose approximation algorithms", "modified male estimation algorithms", "modified passive estimation algorithms"

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