Perhaps you should try some spelling variations:
"modified rough approximations algorithms" » "modified rough approximation algorithms", "modified rough approximation algorithm", "modified one approximation algorithms"
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization 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 rough approximations algorithms") OR ("modified notion optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified rough approximations algorithms\") OR (\"modified notion optimization algorithms\"))".
• Removing quotes may allow a broader search: (( modified rough approximations algorithms ) OR ( modified notion optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified rough approximations algorithms") OR ("modified notion optimization algorithms"))*.