Perhaps you should try some spelling variations:
"modified allocation optimization algorithms" » "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified allocation optimized algorithms", "modified location optimization algorithms"
"modified over estimation algorithm" » "modified cover estimations algorithm", "modified pose estimation algorithm", "modified sphere estimation algorithm", "modified near estimation algorithm", "modified orca estimation 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 over estimation algorithm") OR ("modified allocation optimization algorithms"))~.
• Removing quotes may allow a broader search: (( modified over estimation algorithm ) or ( modified allocation optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified over estimation algorithm") or ("modified allocation optimization algorithms"))*.