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