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