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 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: (("modified game optimization algorithm") OR ("modified network approximation algorithm"))~.
• Removing quotes may allow a broader search: (( modified game optimization algorithm ) or ( modified network approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified game optimization algorithm") or ("modified network approximation algorithm"))*.