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

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

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