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