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

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