Perhaps you should try some spelling variations:
"modified robust optimization algorithmssss" » "modified robust optimization algorithms", "modified robust optimisation algorithm", "modified robust optimization algorithmsssss", "modified robust optimisation algorithmssss", "modified robust estimation algorithmssss"
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation 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 robust optimization algorithmssss"))~.
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) or ( modified robust optimization algorithmssss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") or ("modified robust optimization algorithmssss"))*.