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