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