Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified qoe estimation algorithmss" » "modified qoe estimation algorithms", "modified qoe optimization algorithms", "modified pose estimation algorithmss", "modified _ estimation algorithmss", "modified cover estimations algorithmss", "modified male estimation algorithmss", "modified bi1 estimation algorithmss"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective estimation algorithm") OR ("modified qoe estimation algorithmss"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified multiobjective estimation algorithm\") OR (\"modified qoe estimation algorithmss\"))".
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