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