Perhaps you should try some spelling variations:
"modified parameter optimisation algorithm" » "modified parameter optimization algorithm", "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter estimation algorithms"
"modified invasive estimation algorithmss" » "modified invasive estimation algorithms", "modified invasive estimation algorithm", "modified invasive optimization algorithms", "modified invasive ventilation algorithmss", "modified passive estimation algorithmss"

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

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