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