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