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

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

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