Perhaps you should try some spelling variations:
"modified learning convolution algorithms" » "modified learning evolution algorithm", "modified learning solution algorithm", "mobile learning convolution algorithms", "modified caging convolution algorithms"
"modified invasive estimation algorithms" » "modified invasive estimation algorithm", "modified invasive optimization algorithms", "modified invasive optimisation algorithm", "modified invasive ventilation algorithms", "modified passive estimation algorithms"

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 learning convolution algorithms") OR ("modified invasive estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified learning convolution algorithms ) or ( modified invasive estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified learning convolution algorithms") or ("modified invasive estimation algorithms"))*.