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

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 optimization algorithms\") OR (\"modified caging optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( modified parameter optimization algorithms ) OR ( modified caging optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameter optimization algorithms") OR ("modified caging optimization algorithm"))*.