Perhaps you should try some spelling variations:
"modified parameters optimisation algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimization algorithms", "modified parameters estimation algorithms", "modified parameters estimation algorithm", "modified parameters optimization algorithmss", "modified parameters estimation algorithmss"
"modified _ optimisation algorithm" » "modified _ optimization algorithms", "modified _ estimation algorithm", "modified _ 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 parameters optimisation algorithms\") OR (\"modified _ optimisation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified parameters optimisation algorithms ) OR ( modified _ optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameters optimisation algorithms") OR ("modified _ optimisation algorithm"))*.