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