Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified learning evolutionary algorithm" » "modified learning evolution algorithm", "modified learning solution algorithm", "mobile learning evolutionary algorithm", "modified caging 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 ("modified learning evolutionary algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective estimation algorithm") OR ("modified learning evolutionary algorithm")).
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithm ) or ( modified learning evolutionary algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithm") or ("modified learning evolutionary algorithm"))*.