Perhaps you should try some spelling variations:
"defined network optimisation algorithm" » "defined network optimization algorithms", "defined network estimation algorithms", "defined network optimization algorithm", "designed network optimisation algorithm"
"modified parameter estimation algorithm" » "modified parameter estimates algorithm", "modified parameter optimization algorithm"

You may be able to get more results by adjusting your search query.

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