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

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 optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified _ optimisation algorithms ) OR ( modified parameters optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimisation algorithms") OR ("modified parameters optimization algorithms"))*.