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 changing optimized algorithms" » "modified changing optimized algorithm", "modified changing optimizer algorithms", "modified changing optimization algorithms", "modified choosing optimizer algorithms", "modified caging optimized algorithms"

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 changing optimized algorithms"))~.
• Removing quotes may allow a broader search: (( modified allocation estimation algorithms ) or ( modified changing optimized algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified allocation estimation algorithms") or ("modified changing optimized algorithms"))*.