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"
"mapping graining methods algorithm" » "mapping learning methods algorithm", "mapping learning method algorithm", "mapping making methods 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: (("mapping graining methods algorithm") OR ("modified allocation estimation algorithms"))~.
• Removing quotes may allow a broader search: (( mapping graining methods algorithm ) or ( modified allocation estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("mapping graining methods algorithm") or ("modified allocation estimation algorithms"))*.