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