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