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 objective estimation algorithmss" » "modified objective estimation algorithms", "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimization algorithmss", "modified objective allocation algorithmss"

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 parameter optimisation algorithm\") OR (\"modified objective estimation algorithmss\"))~".
• Removing quotes may allow a broader search: (( modified parameter optimisation algorithm ) OR ( modified objective estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameter optimisation algorithm") OR ("modified objective estimation algorithmss"))*.