Perhaps you should try some spelling variations:
"modified objective optimization algorithmssss" » "modified objective optimisation algorithm", "modified objective optimisation algorithmsss", "modified objective estimation algorithmssss", "modified objective estimation algorithmsss", "modified multiobjective optimization algorithmssss"
"modified network optimization algorithms" » "modified network optimisation algorithm", "modified network estimation algorithms", "modified network estimation algorithm", "certified network optimization algorithms", "defined network optimization algorithms", "modified near optimization 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 network optimization algorithms") or ("modified objective optimization algorithmssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified network optimization algorithms") OR ("modified objective optimization algorithmssss")).
• Removing quotes may allow a broader search: (( modified network optimization algorithms ) or ( modified objective optimization algorithmssss )).
• Adding a wildcard symbol may retrieve word variants: (("modified network optimization algorithms") or ("modified objective optimization algorithmssss"))*.