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