Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation algorithms"
"enabling learning predation algorithm" » "enabling learning predators algorithm", "enabling learning estimation algorithm", "enabling learning prediction algorithm", "enabling learning emotion algorithm", "mapping learning predation algorithm"

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: (("enabling learning predation algorithm") OR ("modified objective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( enabling learning predation algorithm ) or ( modified objective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("enabling learning predation algorithm") or ("modified objective estimation algorithms"))*.