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