Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified orca solution algorithms" » "modified orca solution algorithm", "modified orca evolution algorithm", "modified orca convolution algorithms", "modified norway solution algorithms", "modified drug solution algorithms", "modified nacl solution 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 multiobjective optimization algorithm") or ("modified orca solution algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimization algorithm") OR ("modified orca solution algorithms")).
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithm ) or ( modified orca solution algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithm") or ("modified orca solution algorithms"))*.