Perhaps you should try some spelling variations:
"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"
"machines using methods algorithm" » "machinery using methods algorithm", "machines nursing methods algorithm", "machines making methods algorithm", "machines counting methods 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: (("machines using methods algorithm") OR ("modified game optimization algorithm"))~.
• Removing quotes may allow a broader search: (( machines using methods algorithm ) or ( modified game optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines using methods algorithm") or ("modified game optimization algorithm"))*.