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