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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified _ optimisation algorithms\") OR (\"modified parameters optimisation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified _ optimisation algorithms ) OR ( modified parameters optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimisation algorithms") OR ("modified parameters optimisation algorithm"))*.