Perhaps you should try some spelling variations:
"modified rough approximations algorithms" » "modified rough approximation algorithms", "modified one approximation algorithms"
"modified df approximation algorithm" » "modified df approximation algorithms", "modified _ approximation algorithm", "modified one approximation algorithm", "modified time approximation algorithm", "modified adam approximation algorithm", "modified bi1 approximation algorithm"

You may be able to get more results by adjusting your search query.

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