Perhaps you should try some spelling variations:
"defined network optimization algorithms" » "defined network optimisation algorithm", "defined network estimation algorithm", "defined network optimized algorithms"
"modified allocation estimation algorithms" » "modified allocation optimization algorithms", "modified motion estimation algorithms", "modified allocation estimation algorithm", "modified allocation optimisation algorithm", "modified allocation approximation algorithms"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified allocation estimation algorithms\") OR (\"defined network optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified allocation estimation algorithms ) OR ( defined network optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified allocation estimation algorithms") OR ("defined network optimization algorithms"))*.