Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified marine predation algorithm" » "modified marine predators algorithm", "modified marine estimation algorithm", "modified caging predation algorithm", "modified male predation algorithm", "modified passive predation algorithm"

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

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