Perhaps you should try some spelling variations:
"modified allocation estimation algorithms" » "modified allocation optimization algorithms", "modified motion estimation algorithms", "modified allocation estimation algorithm", "modified allocation optimisation algorithm"
"modified caging predation algorithm" » "modified caging predators algorithm", "modified caging estimation algorithm", "modified aging predation algorithm", "modified changing predation algorithm", "modified charging 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 allocation estimation algorithms") OR ("modified caging predation algorithm"))~.
• Removing quotes may allow a broader search: (( modified allocation estimation algorithms ) or ( modified caging predation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified allocation estimation algorithms") or ("modified caging predation algorithm"))*.