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