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