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