Perhaps you should try some spelling variations:
"modified objective estimation algorithmssss" » "modified objective estimation algorithm", "modified objective estimation algorithmsss", "modified objective optimization algorithmssss", "modified objective optimisation algorithmsss", "modified objective allocation algorithmssss"
"modified parameters estimation algorithms" » "modified parameter estimation algorithms", "modified parameter estimates algorithms", "modified parameter optimization algorithms", "modified parameters estimation algorithm", "modified parameters optimization algorithms", "modified parameters optimisation algorithm"

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