Perhaps you should try some spelling variations:
ventilation algorithm » estimation algorithm, estimation algorithms, evolution algorithm
adaptive ventilation » adaptive quantization, invasive ventilation
optimizer algorithms » optimized algorithms, optimized algorithm, optimization algorithms
modified adaptive » modified passive
df optimizer » _ optimized, _ optimize
modified df » modified _, modified adam, modified bi1

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