Perhaps you should try some spelling variations:
"modified invasive estimation algorithms" » "modified invasive estimation algorithm", "modified invasive optimization algorithms", "modified invasive optimisation algorithm", "modified invasive ventilation algorithms", "modified passive estimation algorithms"
"machine graining methods algorithm" » "machine learning methods algorithm", "machine learning method algorithm", "machine making methods 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: (("machine graining methods algorithm") OR ("modified invasive estimation algorithms"))~.
• Removing quotes may allow a broader search: (( machine graining methods algorithm ) or ( modified invasive estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("machine graining methods algorithm") or ("modified invasive estimation algorithms"))*.