Perhaps you should try some spelling variations:
"designed network approximation algorithm" » "designed network approximation algorithms", "defined 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("designed network approximation algorithm") OR ("modified game optimization algorithm"))~.
• Removing quotes may allow a broader search: (( designed network approximation algorithm ) or ( modified game optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("designed network approximation algorithm") or ("modified game optimization algorithm"))*.