Perhaps you should try some spelling variations:
"modified objective convolution algorithmss" » "modified objective convolution algorithms", "modified objective evolution algorithm"
"modified changing estimation algorithm" » "modified channel estimation algorithm", "modified charging station algorithm", "modified caging estimation algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified changing estimation algorithm") or ("modified objective convolution algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified changing estimation algorithm") OR ("modified objective convolution algorithmss")).
• Removing quotes may allow a broader search: (( modified changing estimation algorithm ) or ( modified objective convolution algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified changing estimation algorithm") or ("modified objective convolution algorithmss"))*.