Perhaps you should try some spelling variations:
"modified network optimization algorithms" » "modified network optimisation algorithm", "modified network estimation algorithms", "modified network estimation algorithm", "certified network optimization algorithms", "defined network optimization algorithms", "modified near optimization algorithms"
"modified delphi evolution algorithm" » "modified delphi solution algorithm", "modified delphi evolutionary algorithm", "modified delphi convolution algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified delphi evolution algorithm") or ("modified network optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified delphi evolution algorithm") OR ("modified network optimization algorithms"))*.
• Removing quotes may allow a broader search: (( modified delphi evolution algorithm ) or ( modified network optimization algorithms ))*.