Perhaps you should try some spelling variations:
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"
"mapping learning predation algorithm" » "mapping learning predators algorithm", "mapping learning prediction algorithm", "mapping learning emotion algorithm", "machine learning predation algorithm", "enabling 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: (("modified objective estimation algorithm") OR ("mapping learning predation algorithm"))~.
• Removing quotes may allow a broader search: (( modified objective estimation algorithm ) or ( mapping learning predation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithm") or ("mapping learning predation algorithm"))*.