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