Perhaps you should try some spelling variations:
"defined network approximation algorithm" » "defined network approximation algorithms", "designed network approximation algorithm"
"modified game optimization algorithm" » "modified game optimization algorithms", "modified game optimisation algorithm", "modified game estimation algorithm", "modified stage optimization algorithm", "modified qoe optimization algorithm", "modified market optimization algorithm", "modified male optimization algorithm", "modified adam optimization 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: "((\"defined network approximation algorithm\") OR (\"modified game optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( defined network approximation algorithm ) OR ( modified game optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("defined network approximation algorithm") OR ("modified game optimization algorithm"))*.