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