Perhaps you should try some spelling variations:
"modified allocation optimisation algorithm" » "modified allocation optimization algorithm", "modified allocation optimization algorithms", "modified allocation estimation algorithm", "modified allocation estimation algorithms"
"modified passive estimation algorithmss" » "modified passive estimation algorithms", "modified passive estimation algorithm", "modified passive optimization algorithms", "modified pose estimation algorithmss", "modified adaptive estimation algorithmss"

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 passive estimation algorithmss") OR ("modified allocation optimisation algorithm"))~.
• Removing quotes may allow a broader search: (( modified passive estimation algorithmss ) or ( modified allocation optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified passive estimation algorithmss") or ("modified allocation optimisation algorithm"))*.