Perhaps you should try some spelling variations:
"modified policy simulation algorithm" » "modified policy solution algorithm", "modified policy optimisation algorithm", "modified policy estimation algorithms", "modified device simulation algorithm", "modified plant simulation algorithm"
"modified adaptive estimation algorithm" » "modified adaptive ventilation algorithm", "modified quantile estimation algorithm", "modified adaptive quantization algorithm", "modified passive estimation 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 policy simulation algorithm") OR ("modified adaptive estimation algorithm"))~.
• Removing quotes may allow a broader search: (( modified policy simulation algorithm ) or ( modified adaptive estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified policy simulation algorithm") or ("modified adaptive estimation algorithm"))*.