Perhaps you should try some spelling variations:
"modified invasive estimation algorithm" » "modified invasive ventilation algorithm", "modified passive estimation algorithm"
"modified charging optimized algorithm" » "modified charging optimized algorithms", "modified charging optimizer algorithms", "modified choosing optimizer algorithm", "modified caging optimized algorithm", "modified carbon optimized 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 invasive estimation algorithm") OR ("modified charging optimized algorithm"))~.
• Removing quotes may allow a broader search: (( modified invasive estimation algorithm ) or ( modified charging optimized algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified invasive estimation algorithm") or ("modified charging optimized algorithm"))*.