Perhaps you should try some spelling variations:
optimized algorithms » optimized algorithm, optimizer algorithms, optimization algorithms
learning estimation » learning emotion, lighting estimation
objective optimized » objective optimal, objective optimization
modified learning » mobile learning, modified caging

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 estimation algorithm ) or ( modified objective optimized algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified learning estimation algorithm ) OR ( modified objective optimized algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( modified learning estimation algorithm ) or ( modified objective optimized algorithms ))*.