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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified invasive estimation algorithmssss\") OR (\"modified allocation estimation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified invasive estimation algorithmssss ) OR ( modified allocation estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified invasive estimation algorithmssss") OR ("modified allocation estimation algorithm"))*.