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