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