Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, optimized algorithms
adaptive optimization » objective optimization, adaptive quantization, static optimization
learning estimation » learning emotion, lighting estimation
modified adaptive » modified passive
mobile learning » machine learning

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 adaptive optimization algorithms ) OR ( mobile learning estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified adaptive optimization algorithms ) or ( mobile learning estimation algorithm ))*.