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 policy optimized algorithms" » "modified policy optimized algorithm", "modified policy optimizer algorithms", "modified policy optimization algorithms"

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 policy optimized algorithms") OR ("modified objective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified policy optimized algorithms ) or ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified policy optimized algorithms") or ("modified objective optimization algorithm"))*.