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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified passive estimation algorithms") OR ("modified invasive convolution algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified passive estimation algorithms\") OR (\"modified invasive convolution algorithms\"))".
• Removing quotes may allow a broader search: (( modified passive estimation algorithms ) OR ( modified invasive convolution algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified passive estimation algorithms") OR ("modified invasive convolution algorithms"))*.