Perhaps you should try some spelling variations:
"modified parameter optimization algorithms" » "modified parameter optimisation algorithm", "modified parameter estimation algorithm", "modified parameter optimized algorithms", "modified parameters optimization algorithms"
"modified topology estimation algorithms" » "modified topology estimation algorithm", "modified topology optimisation algorithm", "modified topology approximation algorithms", "modified topology optimization algorithms"

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