Perhaps you should try some spelling variations:
"modified notion optimisation algorithm" » "modified notion optimization algorithms", "modified notion estimation algorithm", "modified notion estimation algorithms", "modified network optimization algorithm"
"modified response optimization algorithm" » "modified response optimization algorithms", "modified response estimation algorithm", "modified response estimation algorithms"

Try widening your search to All Fields.

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

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