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

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