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