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