Perhaps you should try some spelling variations:
ventilation algorithm » estimation algorithm, estimation algorithms, evolution algorithm
passive ventilation » adaptive ventilation, invasive ventilation
modified passive » modified adaptive
graining methods » learning methods, learning method, making methods
code graining » coarse graining

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 ( code graining methods algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified passive ventilation algorithm ) OR ( code graining methods algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified passive ventilation algorithm ) or ( code graining methods algorithm ))*.