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

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: (("focusing optimization algorithmss") OR ("parameters optimization algorithms"))~.
• Removing quotes may allow a broader search: (( focusing optimization algorithmss ) or ( parameters optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("focusing optimization algorithmss") or ("parameters optimization algorithms"))*.