Perhaps you should try some spelling variations:
"modified parameters optimisation algorithmss" » "modified parameters optimisation algorithm", "modified parameters optimization algorithms", "modified parameters estimation algorithms", "modified parameter optimization algorithmss", "modified parameter estimation algorithmss"
"modified robust optimization algorithm" » "modified robust optimization algorithms", "modified robust optimisation algorithm", "modified robust estimation 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 robust optimization algorithm") or ("modified parameters optimisation algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified robust optimization algorithm") OR ("modified parameters optimisation algorithmss")).
• Removing quotes may allow a broader search: (( modified robust optimization algorithm ) or ( modified parameters optimisation algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified robust optimization algorithm") or ("modified parameters optimisation algorithmss"))*.