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