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