Perhaps you should try some spelling variations:
"modified orcad optimization algorithms" » "modified orcad estimation algorithms", "modified orcad estimation algorithm", "modified orcad optimized algorithms", "modified orca optimization algorithms"
"modified notion optimisation algorithm" » "modified notion estimation algorithm", "modified notion estimation algorithms", "modified network 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 orcad optimization algorithms") OR ("modified notion optimisation algorithm"))~.
• Removing quotes may allow a broader search: (( modified orcad optimization algorithms ) or ( modified notion optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orcad optimization algorithms") or ("modified notion optimisation algorithm"))*.