Perhaps you should try some spelling variations:
"modified invasive estimation algorithmssss" » "modified invasive estimation algorithms", "modified invasive ventilation algorithmssss", "modified passive estimation algorithmssss"
"modified allocation estimation algorithm" » "modified allocation optimization algorithm", "modified motion 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 allocation estimation algorithm") OR ("modified invasive estimation algorithmssss"))~.
• Removing quotes may allow a broader search: (( modified allocation estimation algorithm ) or ( modified invasive estimation algorithmssss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified allocation estimation algorithm") or ("modified invasive estimation algorithmssss"))*.