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