Perhaps you should try some spelling variations:
"optimization algorithmss" » "estimation algorithms", "estimation algorithm", "optimized algorithms", "estimation algorithmss", "optimized algorithmss"
"optimization algorithms" » "estimation algorithms", "estimation algorithm", "optimized algorithms"
"optimisation algorithm" » "estimation algorithm", "estimation algorithms"

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