Perhaps you should try some spelling variations:
"modified passive quantization algorithm" » "modified passive estimation algorithm", "modified adaptive quantization algorithm"
"modified traces optimisation algorithm" » "modified traces optimization algorithms", "modified traces estimation algorithm", "modified traces estimation algorithms", "modified trace optimisation 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 passive quantization algorithm") OR ("modified traces optimisation algorithm"))~.
• Removing quotes may allow a broader search: (( modified passive quantization algorithm ) or ( modified traces optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified passive quantization algorithm") or ("modified traces optimisation algorithm"))*.