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"
"modified co solution algorithm" » "modified co evolution algorithm", "modified co convolution algorithms", "modified co evolutionary algorithm", "modified _ solution algorithm", "modified df solution algorithm", "modified orca solution algorithm", "modified nacl 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: (("modified objective optimization algorithm") OR ("modified co solution algorithm"))~.
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) or ( modified co solution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") or ("modified co solution algorithm"))*.