Perhaps you should try some spelling variations:
"defined network optimization algorithmssss" » "defined network optimization algorithms", "defined network optimisation algorithm", "designed network optimization algorithmssss"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"

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 algorithmssss") OR ("modified objective estimation algorithm"))~.
• Removing quotes may allow a broader search: (( defined network optimization algorithmssss ) or ( modified objective estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network optimization algorithmssss") or ("modified objective estimation algorithm"))*.