Perhaps you should try some spelling variations:
"modified delphi convolution algorithms" » "modified delphi evolution algorithm", "modified delphi solution algorithm"
"modified saline estimation algorithms" » "modified saline estimation algorithm", "modified saline optimization algorithms", "modified saline optimisation algorithm", "modified sphere estimation algorithms", "modified caging estimation algorithms", "modified male estimation algorithms", "modified passive estimation algorithms"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified delphi convolution algorithms") or ("modified saline estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified delphi convolution algorithms") OR ("modified saline estimation algorithms")).
• Removing quotes may allow a broader search: (( modified delphi convolution algorithms ) or ( modified saline estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified delphi convolution algorithms") or ("modified saline estimation algorithms"))*.