Perhaps you should try some spelling variations:
"modified df convolution algorithms" » "modified df evolution algorithm", "modified df solution algorithm", "modified d convolutional algorithms", "modified _ convolution algorithms", "modified adam convolution algorithms", "modified bi1 convolution algorithms"
"modified dfdamdaptive estimation algorithm" » "modified adaptive estimation algorithm", "modified _damdaptive estimation algorithm", "modified adamdamdaptive estimation algorithm", "modified bi1damdaptive estimation 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 dfdamdaptive estimation algorithm") OR ("modified df convolution algorithms"))~.
• Removing quotes may allow a broader search: (( modified dfdamdaptive estimation algorithm ) or ( modified df convolution algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified dfdamdaptive estimation algorithm") or ("modified df convolution algorithms"))*.