Perhaps you should try some spelling variations:
"modified dfdamdaptive estimation algorithm" » "modified adaptive estimation algorithm", "modified _damdaptive estimation algorithm", "modified adamdamdaptive estimation algorithm", "modified bi1damdaptive estimation algorithm"
"modified df optimized algorithms" » "modified df optimized algorithm", "modified df optimizer algorithms", "modified df optimization algorithms", "modified _ optimized algorithms", "modified _ optimize algorithms", "modified adam optimized algorithms", "modified bi1 optimized 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 dfdamdaptive estimation algorithm") OR ("modified df optimized algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified dfdamdaptive estimation algorithm\") OR (\"modified df optimized algorithms\"))".
• Removing quotes may allow a broader search: (( modified dfdamdaptive estimation algorithm ) OR ( modified df optimized algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified dfdamdaptive estimation algorithm") OR ("modified df optimized algorithms"))*.