Perhaps you should try some spelling variations:
"modified delphi evolutionary algorithm" » "modified delphi evolution algorithm", "modified delphi solution algorithm"
"modified location optimisation algorithm" » "modified location optimization algorithms", "modified location estimation algorithm", "modified location estimation algorithms", "modified allocation optimization algorithm", "modified carbon optimisation algorithm"

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 evolutionary algorithm") or ("modified location optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified delphi evolutionary algorithm") OR ("modified location optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified delphi evolutionary algorithm ) or ( modified location optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified delphi evolutionary algorithm") or ("modified location optimisation algorithm"))*.