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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified invasive estimation algorithms\") OR (\"modified parameter optimization algorithmss\"))~".
• Removing quotes may allow a broader search: (( modified invasive estimation algorithms ) OR ( modified parameter optimization algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified invasive estimation algorithms") OR ("modified parameter optimization algorithmss"))*.