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

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