Perhaps you should try some spelling variations:
"modified response estimation algorithms" » "modified response estimation algorithm", "modified response optimization algorithms", "modified response optimisation algorithm", "modified pose estimation algorithms", "modified response association algorithms"
"modified caging approximation algorithms" » "modified one approximation algorithms", "modified time 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 response estimation algorithms") OR ("modified caging approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified response estimation algorithms ) or ( modified caging approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified response estimation algorithms") or ("modified caging approximation algorithms"))*.