Perhaps you should try some spelling variations:
"verified network optimization algorithms" » "verified network optimisation algorithm", "verified network estimation algorithms", "verified network optimized algorithms", "certified network optimization algorithms", "defined network optimization algorithms"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation 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 objective estimation algorithm") OR ("verified network optimization algorithms"))~.
• Removing quotes may allow a broader search: (( modified objective estimation algorithm ) or ( verified network optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithm") or ("verified network optimization algorithms"))*.