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