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