Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"machines using metal algorithm" » "machinery using metal algorithm", "machines using real algorithm", "machines nursing mental algorithm", "machines using medical 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 metal algorithm") OR ("modified notion optimization algorithms"))~.
• Removing quotes may allow a broader search: (( machines using metal algorithm ) or ( modified notion optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines using metal algorithm") or ("modified notion optimization algorithms"))*.