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