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