Perhaps you should try some spelling variations:
"designed network estimation algorithm" » "designed network optimization algorithm", "defined network estimation algorithm"
"modified one approximation algorithms" » "modified time approximation algorithms", "modified _ approximation algorithms", "modified rough approximations algorithms", "modified male approximation algorithms", "modified near approximation algorithms", "modified orca approximation 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: (("designed network estimation algorithm") OR ("modified one approximation algorithms"))~.
• Removing quotes may allow a broader search: (( designed network estimation algorithm ) or ( modified one approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("designed network estimation algorithm") or ("modified one approximation algorithms"))*.