Perhaps you should try some spelling variations:
"modified rough approximation algorithm" » "modified rough approximation algorithms", "modified rough approximations algorithm", "modified one approximation algorithm"
"modified topology optimisation algorithm" » "modified topology optimization algorithms", "modified topology estimation algorithm", "modified topology estimation algorithms", "modified topology optimization algorithm", "modified policy 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 topology optimisation algorithm\") OR (\"modified rough approximation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified topology optimisation algorithm ) OR ( modified rough approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified topology optimisation algorithm") OR ("modified rough approximation algorithm"))*.