Perhaps you should try some spelling variations:
ventilation algorithm » estimation algorithm, estimation algorithms, evolution algorithm
invasive ventilation » adaptive ventilation
optimizer algorithms » optimized algorithms, optimized algorithm, optimization algorithms
objective optimizer » objective optimal, objective optimization
modified invasive » modified passive

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 objective optimizer algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified invasive ventilation algorithm ) or ( modified objective optimizer algorithms ))*.