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