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"

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

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