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 model predictive algorithm" » "modified model predation algorithm", "modified model predators algorithm", "modified model reduction algorithm", "modified male predictive 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 model predictive algorithm") OR ("modified objective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified model predictive algorithm ) or ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified model predictive algorithm") or ("modified objective optimization algorithm"))*.