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