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 algorithms"
"modified marine estimation algorithm" » "modified motion estimation algorithm", "modified risk estimation algorithm", "modified caging estimation algorithm", "modified male estimation algorithm", "modified passive 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 marine estimation algorithm") OR ("modified objective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified marine estimation algorithm ) or ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified marine estimation algorithm") or ("modified objective optimization algorithm"))*.