Perhaps you should try some spelling variations:
"modified parameter optimization algorithm" » "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimation algorithm", "modified parameters optimization algorithm"
"modified exact solution algorithm" » "modified exact evolution algorithm", "modified exact convolution algorithms", "modified exact evolutionary algorithm", "modified nacl solution algorithm"

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