Perhaps you should try some spelling variations:
"modified df estimation algorithmss" » "modified df estimation algorithms", "modified df estimation algorithm", "modified df optimization algorithms", "modified _ estimation algorithmss", "modified adam estimation algorithmss", "modified bi1 estimation algorithmss"
"modified objective evolution algorithm" » "modified objective evolutionary algorithm", "modified objective allocation algorithm", "modified objective solution algorithm", "modified objective convolution algorithms"

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