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