Perhaps you should try some spelling variations:
optimization algorithmss » optimisation algorithm, estimation algorithms, estimation algorithm
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
device optimization » policy optimization
allocation » location

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: (( allocation optimization algorithms ) OR ( device optimization algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (( allocation optimization algorithms ) or ( device optimization algorithmss ))*.