Perhaps you should try some spelling variations:
"modified rough approximations algorithm" » "modified rough approximation algorithm", "modified rough approximation algorithms", "modified one approximation algorithm"
"modified notion optimisation algorithm" » "modified notion optimization algorithms", "modified notion estimation algorithm", "modified notion estimation algorithms", "modified network optimization algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified rough approximations algorithm\") OR (\"modified notion optimisation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified rough approximations algorithm ) OR ( modified notion optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified rough approximations algorithm") OR ("modified notion optimisation algorithm"))*.