Perhaps you should try some spelling variations:
"modified exact optimization algorithms" » "modified exact optimisation algorithm", "modified exact estimation algorithms", "modified exact estimation algorithm", "modified exact optimisation algorithms", "modified exact estimation algorithmss", "modified game optimization algorithms", "modified stage optimization algorithms"
"modified multiobjective optimization algorithm" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified exact optimization algorithms") or ("modified multiobjective optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified exact optimization algorithms") OR ("modified multiobjective optimization algorithm")).
• Removing quotes may allow a broader search: (( modified exact optimization algorithms ) or ( modified multiobjective optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified exact optimization algorithms") or ("modified multiobjective optimization algorithm"))*.