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