Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified pulse optimizer algorithms" » "modified pulse optimized algorithms", "modified pulse optimized algorithm", "modified pulse optimization algorithms", "modified male optimizer algorithms", "modified passive optimizer 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 pulse optimizer algorithms") OR ("modified multiobjective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified pulse optimizer algorithms ) or ( modified multiobjective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified pulse optimizer algorithms") or ("modified multiobjective optimization algorithm"))*.