Perhaps you should try some spelling variations:
"modified response approximation algorithm" » "modified response approximation algorithms", "modified one approximation algorithm", "modified response association 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified topology optimisation algorithm") OR ("modified response approximation algorithm"))~.
• Removing quotes may allow a broader search: (( modified topology optimisation algorithm ) or ( modified response approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified topology optimisation algorithm") or ("modified response approximation algorithm"))*.