Perhaps you should try some spelling variations:
validation algorithm » estimation algorithm, predation algorithm, estimation algorithms
one approximation » time approximation, _ approximation, rough approximations
adam validation » a validation
modified adam » modified df, modified near
modified one » modified male, modified near, modified orca

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 one approximation algorithms ) OR ( modified adam validation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified one approximation algorithms ) or ( modified adam validation algorithm ))*.