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