Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
quantile optimization » quantile estimation, quadratic optimization, static optimization
modified quantile » modified adaptive
learning methods » nursing methods
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 quantile optimization algorithms ) or ( mobile learning methods algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified quantile optimization algorithms ) OR ( mobile learning methods algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified quantile optimization algorithms ) or ( mobile learning methods algorithm ))*.