Perhaps you should try some spelling variations:
"modified network optimization algorithmssss" » "modified network optimization algorithms", "modified network optimisation algorithm", "certified network optimization algorithmssss", "defined network optimization algorithmssss", "modified near optimization algorithmssss"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation algorithms"

Try widening your search to All Fields.

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

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