Perhaps you should try some spelling variations:
"modified caging optimization algorithms" » "modified caging optimisation algorithm", "modified caging estimation algorithms", "modified caging estimation algorithm", "modified staffing optimization algorithms"
"modified parameters estimation algorithmss" » "modified parameters estimation algorithms", "modified parameters estimation algorithm", "modified parameter estimation algorithmss", "modified parameter estimates algorithmss", "modified parameter optimization 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 caging optimization algorithms") OR ("modified parameters estimation algorithmss"))~.
• Removing quotes may allow a broader search: (( modified caging optimization algorithms ) or ( modified parameters estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified caging optimization algorithms") or ("modified parameters estimation algorithmss"))*.