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