Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"code learning aided algorithm" » "code learning adam algorithm", "code learning driven algorithm", "code learning winner algorithm", "code learning based algorithm", "code learning model algorithm", "how learning aided 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: (("code learning aided algorithm") OR ("modified multiobjective optimization algorithms"))~.
• Removing quotes may allow a broader search: (( code learning aided algorithm ) or ( modified multiobjective optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("code learning aided algorithm") or ("modified multiobjective optimization algorithms"))*.