Perhaps you should try some spelling variations:
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithms", "modified parameters estimation algorithm"
"modified male approximation algorithm" » "modified male approximation algorithms", "modified one approximation algorithm", "modified time approximation algorithm", "modified _ approximation algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameters optimization algorithms\") OR (\"modified male approximation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified parameters optimization algorithms ) OR ( modified male approximation algorithm ))~.
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