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