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