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

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

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