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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified pose estimation algorithmss\") OR (\"modified multiobjective estimation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified pose estimation algorithmss ) OR ( modified multiobjective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified pose estimation algorithmss") OR ("modified multiobjective estimation algorithms"))*.