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