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