Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
ventilation algorithms » estimation algorithms, estimation algorithm, convolution algorithms
adaptive ventilation » adaptive quantization, invasive ventilation
near approximation » one approximation, network approximation, _ approximation
modified adaptive » modified passive
modified near » modified seird, modified adam

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