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