Perhaps you should try some spelling variations:
"modified network estimation algorithm" » "modified network optimization algorithm", "certified network estimation algorithm", "defined network estimation algorithm", "modified near 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified one approximation algorithms") OR ("modified network estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified one approximation algorithms\") OR (\"modified network estimation algorithm\"))".
• Removing quotes may allow a broader search: (( modified one approximation algorithms ) OR ( modified network estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified one approximation algorithms") OR ("modified network estimation algorithm"))*.