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