Perhaps you should try some spelling variations:
quantization algorithms » estimation algorithms, optimization algorithms
adaptive quantization » adaptive ventilation
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.

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