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