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