Perhaps you should try some spelling variations:
"modified adaptive quantization algorithms" » "modified adaptive optimization algorithms", "modified adaptive ventilation algorithms", "modified passive quantization algorithms"
"modified quadratic estimation algorithms" » "modified quadratic estimation algorithm", "modified quadratic optimization algorithms", "modified quadratic optimisation algorithm", "modified quantile estimation algorithms"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified quadratic estimation algorithms") or ("modified adaptive quantization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified quadratic estimation algorithms") OR ("modified adaptive quantization algorithms")).
• Removing quotes may allow a broader search: (( modified quadratic estimation algorithms ) or ( modified adaptive quantization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified quadratic estimation algorithms") or ("modified adaptive quantization algorithms"))*.