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