Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
objective estimation » objective optimization, objective allocation
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
learning evolution » learning convolution, learning emotion
modified learning » mobile learning, modified caging

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