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

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameter optimisation algorithm") OR ("defined network optimisation algorithms"))~.
• Removing quotes may allow a broader search: (( modified parameter optimisation algorithm ) or ( defined network optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameter optimisation algorithm") or ("defined network optimisation algorithms"))*.