Perhaps you should try some spelling variations:
"modified notion estimation algorithmsss" » "modified notion estimation algorithms", "modified notion estimation algorithm", "modified motion estimation algorithmsss"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective optimisation algorithm") OR ("modified notion estimation algorithmsss"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimisation algorithm\") OR (\"modified notion estimation algorithmsss\"))*".
• Removing quotes may allow a broader search: (( modified objective optimisation algorithm ) OR ( modified notion estimation algorithmsss ))*.