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 allocation optimizer algorithms" » "modified allocation optimization algorithms", "modified allocation optimized algorithms", "modified allocation optimized algorithm"

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 df convolution algorithms") or ("modified allocation optimizer algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified df convolution algorithms") OR ("modified allocation optimizer algorithms")).
• Removing quotes may allow a broader search: (( modified df convolution algorithms ) or ( modified allocation optimizer algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified df convolution algorithms") or ("modified allocation optimizer algorithms"))*.