Perhaps you should try some spelling variations:
"modified quantile optimization algorithms" » "modified quantile optimisation algorithm", "modified quantile estimation algorithms", "modified quantile estimation algorithm", "modified quadratic optimization algorithms", "modified static optimization algorithms", "modified adaptive optimization algorithms"
"modified df approximation algorithms" » "modified _ approximation algorithms", "modified one approximation algorithms", "modified time approximation algorithms", "modified adam approximation algorithms", "modified bi1 approximation 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 df approximation algorithms") OR ("modified quantile optimization algorithms"))~.
• Removing quotes may allow a broader search: (( modified df approximation algorithms ) or ( modified quantile optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified df approximation algorithms") or ("modified quantile optimization algorithms"))*.