Perhaps you should try some spelling variations:
"modified dfdamdaptive estimation algorithm" » "modified adaptive estimation algorithm"
"modified 3d simulation algorithm" » "modified 3d solution algorithm", "modified 3d optimisation algorithm", "modified 3d estimation algorithms", "modified _ simulation algorithm", "modified a simulation algorithm", "modified mri simulation algorithm", "modified df simulation algorithm", "modified adam simulation 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 dfdamdaptive estimation algorithm") or ("modified 3d simulation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified dfdamdaptive estimation algorithm") OR ("modified 3d simulation algorithm")).
• Removing quotes may allow a broader search: (( modified dfdamdaptive estimation algorithm ) or ( modified 3d simulation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified dfdamdaptive estimation algorithm") or ("modified 3d simulation algorithm"))*.