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

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