Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
learning solution » learning convolution, learning emotion
df optimisation » _ optimisation, _ optimization, qoe optimization
mobile learning » machine learning
modified df » modified _, modified adam, modified bi1

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

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