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

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: "((\"designed network estimation algorithm\") OR (\"modified allocation optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( designed network estimation algorithm ) OR ( modified allocation optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("designed network estimation algorithm") OR ("modified allocation optimization algorithms"))*.