Perhaps you should try some spelling variations:
"modified orcad convolution algorithms" » "modified orcad evolution algorithm", "modified orcad solution algorithm", "modified orca convolution algorithms"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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 convolution algorithms") OR ("modified objective optimisation algorithm"))~.
• Removing quotes may allow a broader search: (( modified orcad convolution algorithms ) or ( modified objective optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orcad convolution algorithms") or ("modified objective optimisation algorithm"))*.