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
modified graining » modified caging
graining methods » learning methods, learning method, making methods

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 quantile optimization algorithms ) OR ( modified graining methods algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified quantile optimization algorithms ) or ( modified graining methods algorithm ))*.