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