Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"enabling learning evolutionary algorithm" » "enabling learning evolution algorithm", "enabling learning solution algorithm", "mapping learning evolutionary algorithm"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective estimation algorithm") or ("enabling learning evolutionary algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective estimation algorithm") OR ("enabling learning evolutionary algorithm")).
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithm ) or ( enabling learning evolutionary algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithm") or ("enabling learning evolutionary algorithm"))*.