Perhaps you should try some spelling variations:
ventilation algorithm » estimation algorithm, estimation algorithms, evolution algorithm
passive ventilation » adaptive ventilation, invasive ventilation
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
learning solution » learning convolution, learning emotion
modified passive » modified adaptive
mobile learning » machine learning

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified passive ventilation algorithm ) or ( mobile learning solution algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified passive ventilation algorithm ) OR ( mobile learning solution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified passive ventilation algorithm ) or ( mobile learning solution algorithm ))*.